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EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
Conference Venue
Public transport
From Dubai International Airport
By Metro:
Take the Red Line from Airport towards Jebel Ali and get off at the World Trade Centre Station
By Bus:
Take the Bus Number 33 to Creek Golf club and change bus number 27 To Convention Centre
bus stop
By Road:
From the Airport follow directions to Garhoud bridge going towards Sheikh Zayed Road. From
Trade Centre roundabout take the Zabeel exit and follow directions to convention Centre.
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
Contents
General Information........................................................................................................1
Program-at-a-glance........................................................................................................3
Program Schedule............................................................................................................4
Monday, Nov. 14 .....................................................................................................4
Tuesday, Nov. 15.....................................................................................................5
Abstract Session..............................................................................................................1
Author Index..................................................................................................................24
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
PROGRAM·1
General Information
The EMN Dubai Meeting 2016 will take place at ibis One Central, Dubai, United Arab Emirates. The
conference will be held from November 13 to 16, 2016.
Workshops on selected focus topics will include invited and contributed oral presentations from
Monday to Tuesday.
Registration Desk Hours
The EMN Dubai Meeting 2016 registration desk, located in the hotel lobby, will be open during the
following hours:
Sunday, Nov. 13…………………..........................................................................15:00 - 17:00
Monday, Nov. 14…………………………………………………………...……….9:00 - 17:30
Tuesday, Nov. 15……………………………..………………………….………….9:00 - 17:30
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
PROGRAM·2
COMMITTEES
Hyoung Koo Lee, Missouri University of Science and Technology, USA
Holger Vach, Ecole Polytechnique, University Paris-Saclay, France
Valery E. Ptitsin, Institute for Analytical Instrumentation of the Russian Academy of Sciences,
Russia
Tatsutoshi Shioda, Saitama University, Japan
Masayuki Nakamoto, Massachusetts Institute of Technology, Japan
Chao Chang, Xi’an Jiaotong University, China
Soheli Farhana, International Islamic University Malaysia, Malaysia.
Shin’ichiro Hayashi, National Institute of Information and Communications Technology (NICT),
Japan
Norio Masuda, NEC Network and Sensor Systems, Japan
Norihiko Sekine, National Institute of Information and Communications Technology,Japan
Desmond Wang, The University of Melbourne, Australia
Dushyant Sharma, University of Michigan, USA
Hai-Han Lu, National Taipei University of Technology
Jonathan Hu, Baylor University, Waco, Texas, USA
Jietai Jing, East China Normal University, P.R.China
Jianyu Wang, Shanghai Institute of Techinical Physics , CAS
Raed M. Shubair, Massachusetts Institute of Technology, USA
Slimane Abdelhalim, Centre de Développement des Technologies Avancées, Algeria
Yang Yue, Juniper Networks, USA
Zhou Dayong, The University of Oklahoma,USA
Zhiming Wang, University of Electronic Science and Technology of China, China
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
PROGRAM·3
Program at-a-glance
Monday Morning, Nov. 14
Vacuum Electronics & Terahertz 9:30 –11:30
Room A
Monday Afternoon, Nov. 14
Technologies 14:35 –17:25
Room A
Tuesday Morning, Nov. 15
Nonliner Optics 9:30 –11:55
Room A Tuesday Afternoon, Nov. 15
Optical Wireless Communications 14:35 –17:25
Room A
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
PROGRAM·4
Program for EMN Dubai Meeting
November 14-15, 2016
Monday November 14 / Room A
Session: Vacuum Electronics & Terahertz Chair: Takehiro Imura
9:30-9:55 A01: High-brightness Continuousely-tunable
Sub-terahertz wave Source
Shin'ichiro Hayashi
National Institute of Information
and Communications
Technology, Japan
9:55-10:20 A02: Beam shaping of THz radiation
Agnieszka Siemion
Warsaw University of
Technology, Poland
10:20-10:40 Session Break
10:40-11:05
A03: Theory and Simulations of a Traveling Wave
Tube Using Sheet Beam or Ring-shaped Beam for
Terahertz Wave Generation
Jirun Luo
Chinese Academy of Sciences,
China
11:05-11:30 A04: Miniaturized analyzers utilizing pyroelectric
crystal Susumu Imashuku
Tohoku University, Japan
11:30-11:55 A22: Development Activity of Terahertz Power
Module with FWG-TWT
Norio Masuda
NEC Network and Sensor
Systems, Japan
12:00 Lunch Break
Session: Technologies Chair: Jirun Luo
14:35-15:00
A05: Comparison of Four Circuit Topologies of
Magnetic Coupling Using Resonance in Wireless
Power Transfer
Takehiro Imura
The University of Tokyo, Japan
15:00-15:25 A06: Effect of tapering the magnetic field on whistler
pumped free electron laser
Manish Kumar
IIT (BHU), India
15:25-15:50 A07: Biochemical Applications of
Metallo-Supramolecular Polymers
Masayoshi Higuchi
National Institute for Materials
Science, Japan
15:50-16:10 Session Break
16:10-16:35 A08: Novel Properties of Bacterial Flagellar Motor
Revealed by Analyses of Motile Pseudorevertants Kenji Oosawa
Gunma University, Japan
16:35-17:00
A09: Photoelectron Work Function Measurements of
Silver Based Contact Materials Using the Fowler
Formula
Mohamed Akbi
National Preparatory School for
Engineering Studies, Algeria
17:00-17:25 A10: Non-Unitary Effects Mitigation for Few-Mode
Fiber Transmission Systems
El-Mehdi Amhoud
Université Paris-Saclay, France
18:00 Dinner Social
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
PROGRAM·5
Tuesday November 15 / Room A
Session: Nonliner Optics Chair: Marcin Kowalczyk
9:30-9:55 A11: Single Blood cell imaging by lens free chip
microscopy
Rainer Riesenberg
Leibniz Institute of Photonic
Technology, Germany
9:55-10:20
A12: Design of Silica Optical Fibers with Enlarged
Core Diameter for Few-Mode Applications of
Laser-Based Data Transmission
Anton Bourdine
Povolzhskiy State University of
Telecommunications and
Informatics, Russia
10:20-10:45
A13: Offset-Frequency-Spaced Two-Tone Optical
Coherent Detection Scheme of Radio-over-Fiber
Signal and Its Polarization Diversity Technique
Toshiaki Kuri
National Institute of Information
and Communications
Technology, Japan
10:45-11:05 Session Break
11:05-11:30
A14: Synchronized Pulse Optical Cavities and their
Applications in Nonlinear and Quantum Optics
Bhaskar Kanseri
Indian Institute of Technology
Delhi, India
11:30-11:55 A15: Rare-earth doped integratable micro-nano
materials and devices
Zhisong Xiao
Beihang University, China
12:00 Lunch Break
Session: Optical Wireless Communications Chair: Anton Bourdine
14:35-15:00 A16: Possibility of application the MIMO technique
in VLC systems
Marcin Kowalczyk
Warsaw University of
Technology, Poland
15:00-15:25 A17: Uplink Design for VLC systems Employing
Infrared Wireless Links
Mohammed T. Alresheedi
King Saud University, Kingdom
of Saudi Arabia
15:25-15:50
A18: First in-orbit verification of space laser
communications for micro-satellites and
LEO-to-ground polarization measurements at
1.5-μm wavelength
Morio Toyoshima
National Institute of Information
and Communications
Technology , Japan
15:50-16:10 Session Break
16:10-16:35 A19: Digital Signal Processing in Optical Inter
Satellite Link Receivers
Semjon Schaefer
Christian-Albrechts-Universität
zu Kiel, Germany
16:35-17:00 A20: Kerr Combs in Microresonators: Harmonizing
Chaos into Solitons
Michael Gorodetsky
Moscow State University, Russia
17:00-17:25 A21: Advanced Radio over Fiber Network
Technologies
Seyedreza Abdollahi
Brunel University London, UK
18:00 Dinner Social
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·1
Invited Talk Session A01: High-brightness Continuousely-tunable
Sub-terahertz wave Source
Shin‟ichiro Hayashi1,2
, Kouji Nawata2, Kodo
Kawase3, and Hiroaki Minamide
2
1National Institute of Information and Communications
Technology, Tokyo, Japan
2RIKEN Center for Advanced Photonics, Sendai, Japan
3Graduate School of Engineering, Nagoya University,
Nagoya, 464-8603 Japan.
Email:[email protected]
Sub-terahertz electromagnetic waves
(frequency: 0.1–1 THz, wavelength: 0.3–3 mm) are
important not only in the basic sciences, such as
molecular spectroscopy, electron acceleration,
plasma measurement, and radio astronomy, but also
in numerous applications, such as broadband
wireless communication, high-precision radar,
global environmental measurement, and
nondestructive inspection, since they have higher
directivity than microwaves and higher
transmittances in the atmosphere and in soft
materials than terahertz waves (frequency > 1 THz,
wavelength < 0.3 mm). Therefore, high-brightness
(high-peak-power and narrow-linewidth) and
continuously tunable sub-terahertz wave sources that
could be widely used in such applications are
required. High-brightness sub-terahertz wave
sources have been developed since the 1970s and
have mainly employed large-scale sources, such gas
lasers, free-electron lasers, and gyrotrons. In recent
years, with the remarkable upgrade to
higher-frequency millimeter-wave oscillators based
on semiconductor technology, sub-terahertz light
sources have become more widely used. Meanwhile,
the terahertz wave generation method based on
wavelength conversion using nonlinear optical
crystals is attracting attention for its high conversion
efficiency, wide tunability, and usability at room
temperature. If the tunable bandwidth achievable by
this method can be expanded to lower frequencies
(longer wavelengths), and if seamless connections
with mature semiconductor devices can be achieved,
its rapid development can be expected, which would
benefit basic research and advance industrial
applications.
We demonstrate in this presentation the
generation of high-brightness sub-terahertz waves
(peak power of > 7 W, linewidth < 5 GHz) using
parametric wavelength conversion in a nonlinear
MgO doped LiNbO3 crystal, this is brighter than
many specialized sources such as free-electron lasers
worked at terahertz region. We revealed novel
parametric wavelength conversion process using
stimulated Raman scattering in MgO:LiNbO3
without stimulated Brillouin scattering using
recently-developed microchip Nd:YAG laser. We
also demonstrated the coherent (the energy and the
phase) detection of input terahertz waves using
nonlinear up-conversion.
A number of applications require high
brightness, that is, intense and narrowband,
sub-terahertz waves such as observing multi-photon
absorption to specific excitation states. We speculate
that the high-brightness sub-terahertz wave and its
visualization could be powerful tools not only for
solving real world problems but also fundamental
physics, such as real-time spectroscopic imaging,
remote sensing, 3D-fabrication, and manipulation or
alteration of atoms, molecules, chemical materials,
proteins, cells, chemical reactions, and biological
processes. We expect that these methods will open
up new fields and tune up killer applications.
Acknowledgements
The authors would like to thank Prof. T. Taira of IMS, Dr.
H. Sakai of Hamamatsu Photonics, all of previous and
present team members, Prof. H. Ito of RIKEN and Prof.
M. Kumano of Tohoku University for useful discussions.
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·2
This work was partially supported by Collaborative
Research Based on Industrial Demand of the Japan
Science and Technology Agency (JST), and JSPS
KAKENHI Grant Numbers 25220606, and ImPACT
Program of Council for Science, Technology and
Innovation.
A02: Beam shaping of THz radiation
Agnieszka Siemion1
1 Faculty of Physics, Warsaw University of Technology,
Warsaw, Poland
Email:[email protected], web site:
http://www.if.pw.edu.pl
Simple and advanced THz systems can be
improved by the use of the diffractive optical
components. Such optical elements allow to control
beam profiles for illumination and to focus or image
the THz radiation on the detector. Moreover, for
conventional and unconventional imaging
applications we can use dedicated THz optics. In all
these cases the technical aspect of the designing and
manufacturing THz optical elements is crucial.
Depending on application a phase retardation
introduced by these elements can be coded in the
form of the first order kinoform [1] to provide
almost 100% diffraction efficiency for narrowband
illumination case. Furthermore, in case of the higher
order kinoforms [2,3] we are capable to suppress
chromatic aberration strictly related to diffractive
optics. Such approach allows to apply diffractive
optical structures also for broadband illumination.
Moreover, together with fast development of
technique manufacturing of optical elements became
easy and fast by the use of 3D printable materials
which are transparent enough in the THz range. Due
to the good optical properties of paper for some
range of THz radiation it can be used for fast
prototyping [4, 5] or even manufacturing of working
optical structures. Using such material introduces
relatively not expensive way of examination of final
requirements and performance of the system.
Designing optical elements requires taking
into account not only the theoretical formulas and
assumptions but also the geometry of real optical
system and manufacturing possibilities. Each
application results in different setup configuration
which must be taken into account in the designing
process. Therefore, such parameters as the geometry
of the experimental setup, the surrounding
conditions and manufacturing possibilities must be
examined in detail before designing the optical
element dedicated to the particular application. Fig.
1 illustrates different types of lens-like structures
manufactured from paper than can be applied for
scanners, spectral imaging or simple focusing,
redirecting and shaping the beam. It can be seen that
structures have different shapes, but also different
level of difficulty, advancement and complexity.
Thus, we can see binary structures that have smaller
diffractive efficiency than phase structures having
more phase levels, but they are much easier to
manufacture. According to theoretical assumption
for diffractive gratings their optical efficiency is
limited to approximately 40%. If such efficiency
becomes insufficient, such optical elements may be
replaced with more complicated optical components
like kinoforms with almost 100% of diffraction
efficiency (in the case of lossless media and
suppressed Fresnel reflections).
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·3
Fig1. Different optical lens-like structures manufactured
from paper.
1. J. A. Jordan, et al., “Kinoform Lenses”, Appl.
Opt. vol. 9, pp. 1883-1887, (1970).
2. J. C. Marron, D. K. Angell, and A. M. Tai,
“Higher-Order Kinoforms”, Proc. SPIE 1211, pp.
62-66, (1990).
3. J. Suszek, et al., "High order kinoforms as a
broadband achromatic diffractive optics for
terahertz beams", Optics Express, Vol. 22, Issue
3, pp. 3137-3144, (2014).
4. A. Siemion et al., "Diffractive paper lens for
terahertz optics," Opt. Lett. 37, 4320–4322
(2012).
5. A.Siemion et al., "THz beam shaping based on
paper diffractive optics," DOI (identifier)
10.1109/TTHZ.2016.2575440, (2016).
A03: Theory and Simulations of a Traveling
Wave Tube Using Sheet Beam or Ring-shaped
Beam for Terahertz Wave Generation
Jirun Luo, Zhiqiang Zhang, Wenqiu Xie, Zicheng
Wang, Ding Zhao
Institute of Electronics, Chinese Academy of Sciences,
Beijing 100190, China
Email:[email protected]
The planer grating arrays are all-metal periodic
slow-wave structure (SWS) which are compatible
with the MEMS fabrication technology and are
hopeful to produce high output power at millimeter
and even terahertz (THz) wave when interacting
with the sheet electron beam. Compared with the
single grating arrays and the double grating arrays,
the staggered double grating arrays can enhance the
interaction impedance and broaden the operating
bandwidth of the fundamental mode effectively by
the shift between the upper and lower grating arrays,
which has good prospects in the applications of high
frequency and high power TWT (Travelling Wave
Tube) and BWO (Back-ward Wave Oscillator). This
talk will focus on the theoretical analysis and the
electromagnetic simulation of high frequency
characteristics and beam-wave interaction in the
TWT for the staggered double grating array slow
wave structure using sheet beam or ring-shaped
beam.
1. A theoretical model for the arbitrarily shaped
groove planer grating arrays was proposed. The
boundary of the groove was approximately
replaced by a series of steps and the formulas of
dispersion and interaction impedance were
obtained utilizing the field matching method
combined with the continuity of transverse
admittance. The higher order terms in the
grooves were taken into account to make the
model closer to practical situation. Based on the
„cold‟ dispersion, the „hot‟ dispersion equation
was derived for describing the linear beam-wave
interaction between the planer grating arrays and
the sheet electron beam.
2. The fields‟ distribution and HF (high frequency)
characteristics were compared among the single
grating arrays, double grating arrays and
staggered double grating arrays with the same
geometrical dimensions on the gratings and beam
tunnels by simulation with the full-wave
electromagnetic software CST-MWS. Theoretical
model was investigated by comparing their
calculation results of the HF characteristics of the
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·4
planer grating arrays with those obtained by the
CST-MWS code. The dispersion of a W band
staggered double grating arrays was measured
and the experiment results were compared to the
electromagnetic simulations and numerical
calculations.
3. A three dimensional (3-D) frequency domain
large signal model for illustrating the nonlinear
beam-wave interaction in the sheet beam TWT
and BWO based on the planer grating arrays is
presented. The self-consistent beam-wave
interaction equations are derived based on the
Floquet's theorem, the Poyting's theorem, the
equations of motion and the relativistic theorem.
Sheet beam is simulated by a set of discrete rays.
The ac and dc space-charge fields are obtained by
solving the discrete Helmholtz equations and the
discrete Poisson equation, respectively.
Nonlinear analysis for a W-band sheet beam
TWT based on a staggered double grating arrays
and a 1.03THz single grating arrays sheet beam
BWO are performed and the numerical
calculation results are compared with those
obtained from time-domain 3-D particle-in-cell
(PIC) simulations performed by CST-PS.
4. The beam-wave interaction systems for the THz
sheet beam TWT and BWO are designed and
optimized. The dimensional parameters of the
SWS are derived based on the theoretical model.
A wideband input/output structure for the
staggered double grating is proposed, which has
the merits of simple structure, low reflection and
high isolation to the gun and collector in a wide
frequency band. PIC simulations for the
beam-wave interaction systems are performed
utilizing the CST-PS.
5. The formulae of dispersion and interaction
impedance of the axisymmetric TM modes in a
coaxial double-grating slow-wave structure are
obtained utilizing field matching method, in
which the higher order terms of the field in the
grooves have been considered. The high
frequency characteristics of lowest two modes -
fundamental mode and the TM01 mode – in the
SWS were discussed by adjusting its structure
parameters. The calculated results for the
dispersion curve and the interaction impedance
were compared with those simulated by
CST-MWS code. And the parameter analysis
shows that the rational selection of the position of
the beam tunnel and the relative position of the
upper and lower gratings is helpful for the
development of the traveling-wave tube and the
back-wave oscillator to improve bandwidth and
enhance interaction impedance.
6. If possible, the beam-wave interaction in the TWT
with the coaxial double-grating slow-wave
structure using ring-shaped beam may also be
discussed in this talk.
A04: Miniaturized analyzers utilizing
pyroelectric crystal
Susumu Imashuku
Institute for Materials Research, Tohoku University,
2-1-1 Katahira, Aoba-ku, Sendai, Japan
Email: [email protected]
One can obtain electron beam by changing the
temperature of a pyroelectric crystal in low-vacuum
such as 1 Pa. [1] Utilizing this phenomenon, we
realized a portable electron probe microanalyzer
(EPMA), [2,3] a portable cathodoluminescence (CL)
spectrometer, [4,5], a portable transmission electron
microscopy (TEM), [6] and a portable X-ray tube. [7]
They mainly consist of pyroelectric crystal (LiTaO3),
rotary pump, Peltier device, and detachable vacuum
joints as shown in Fig. 1. We obtained an electron
beam with a spot size of approximately 40 m for
the portable EPMA by setting an electroconductive
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·5
needle on the pyroelectric crystal and coating the
side of the needle tip with an insulating material.
The portable EPMA detects X-rays emitted from a
sample using an X-ray detector. We acquired a line
scan profile of copper with the width of 120 m
using the portable EPMA. The portable CL
spectrometer can detect ppm order of rare earth
elements in mineral ores of zircon and monazite by
measuring CL spectra of the samples. The portable
CL spectrometer can also distinguish rare earth
magnets (samarium-cobalt magnet and neodymium
magnet) from their colors in CL images captured
with a commercial available digital camera. The
portable TEM can obtain an image magnified 50
times.
Fig1. (a) Photo and (b) schematic view of main part of the
portable EPMA, CL spectrometer, TEM, and
X-ray tube. (c) Photo of the electron beam
generation part
1. J. D. Brownridge, Nature 358, 287 (1992).
2. S. Imashuku, A. Imanishi, and J. Kawai, Anal.
Chem. 83, 8363 (2011).
3. S. Imashuku, A. Imanishi, and J. Kawai, Rev. Sci.
Instrum. 84, 073111 (2013).
4. S. Imashuku, N. Fuyuno, K. Hanasaki, and J.
Kawai, Rev. Sci. Instrum. 84, 126105 (2013).
5. S. Imashuku, J. Kawai, and K. Wagatsuma, Surf.
Interface Anal., (2016) accepted.
6. I. Ohtani, S. Imashuku, and J. Kawai, Adv. X-ray
Chem. Anal., Japan 46, 203 (2015).
7. S. Imashuku and J. Kawai, Rev. Sci. Instrum. 83,
016106 (2012).
A05: Comparison of Four Circuit Topologies of
Magnetic Coupling Using Resonance in Wireless
Power Transfer
Takehiro Imura1
1Department of Electrical Engineering, Graduate School
of Engineering, The University of Tokyo, Kashiwashi,
Chiba, JAPAN
Email: imura@ hori.k.u-tokyo.ac.jp
Magnetic resonant coupling technology has
been presented in 2007 and its remarkable
characteristics were surprising[1]. However, it has
been clarified that, in view of circuit topology,
magnetic resonant coupling technology is
electromagnetic induction limited by resonance
phenomena. The circuit topology itself was already
known in the past. In other words, since magnetic
resonant circuit topology had never been used at
large air gap, it became a world-class discovery.
Magnetic resonant coupling is easily
understandable by categorizing each circuit topology.
Therefore, in this paper, the variation of efficiency
and power is discussed by considering four circuit
topologies. Specifically, the four circuits are as
follows: no resonant capacitor (N-N), capacitor
connected in series to secondary side (N-S),
capacitor connected in series to primary side (S-N),
and capacitor connected in series to both sides (S-S).
The S-S is magnetic resonant coupling.
Finally, it is shown that maximum efficiency
and high power can be simultaneously obtained only
from magnetic resonant coupling.
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·6
(a) N-N (b) N-S
(c) S-N (d) S-S
Fig. 1. Circuit topologies
1. André Kurs, Aristeidis Karalis, Robert Moffatt, J.
D. Joannopoulos, Peter Fisher, Marin Soljačić,
“Wireless Power Transfer via Strongly Coupled
Magnetic Resonances,” in Science Express on 7
June 2007, Vol. 317. no. 5834, pp. 83 – 86.
A06: Effect of tapering the magnetic field on
whistler pumped free electron laser
Manish Kumar1, Sunil Kumar
2
1Electrical Engineering Department, IIT (BHU),
Varanasi-221005, U.P., INDIA
Email: [email protected] , web site:
http://www.iitbhu.ac.in/eee/index.php/peo/faculty/34-mk.h
tml
2Student, New L-33Hyderabad Colony BHU,
Varanasi-221005, U.P., INDIA
The introduction of magnetized plasma medium
in the interaction region of a whistler-pumped
free-electron laser (FEL) offers the possibility of
generating short radiation wavelengths using
moderate energy beams. The wiggler wave vector
and its field amplitude are sensitive to the choice of
wave frequency as this slow electromagnetic wave is
dispersive in nature. By tapering the magnetic field
in a wiggler, the efficiency of the trapped electrons
of FEL was obtained up to 20%. The advantage of
this scheme is that the frequency and power of the
FEL can be controlled by tuning the plasma density
and/or magnetic field also by increasing the energy
of electron beam. Presence of plasma ensures the
space charge and current neutralization and larger
power handling capacity of the device. The
free-electron laser (FEL) operation for wiggler
frequency close to electron cyclotron frequency is
examined. Therefore, FEL dispersion relation,
Growth rate, FEL efficiency and the gain are
estimated.
Fig1. Schematic of tapered magnetic field for whistler
pumped FEL device.
2. A. Sharma and V. K. Tripathi, Physics of
Plasmas, 3, 3116 (1996), “A plasma filled
gyrotron pumped free electron laser”.
3. M. Kumar, L. Bhasin and V K Tripathi,
10.1088/0031-8949/81/04/045504, Phys. Scr. 81,
045504 (5pp), march (2010).
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·7
4. A. Sharma and V. K. Tripathi. “A whistler
pumped free electron laser.” Phys. Fluids. vol. 3 I,
pp. 3375-3378, (1988).
V. K. Tripathi and C. S. Liu, “Sideband
excitation in an electromagnetic wiggler pumped
free electron laser”, Physics of Fluids (1958-1988)
31, 3799 (1988).
5. K. K. Pant and V. K. Tripathi,“Nonlocal theory
of a whistler pumped free electron laser”, Physics
of Plasmas,1, 1025 (1994).
6. K. K. Pant and V. K. Tripathi, “Free Electron
Laser Operation in the Whistler Mode”, ieee
transactions on plasma science, vol. 22, no. 3,
june (1994).
7. K.P. Singh and V.K. Tripathi, “Laser induced
electron acceleration in a tapered magnetic
wiggler”, physics of plasmas volume 11, number
2 february (2004).
A07:Biochemical Applications of
Metallo-Supramolecular Polymers
Masayoshi Higuchi1,2
1National Institute for Materials Science, Tsukuba
305-0044, Japan
Email: [email protected], web site:
http://www.nims.go.jp/fmg/higuchi_e.html
2JST-CREST, Japan
Metallo-supramolecular polymers composed
of metal ions and ditopic organic ligands are
synthesized by the 1:1 complexation of metal ions
with the ligands in solution. The polymers show
unique electrochemical properties such as
electrochromism [1], emissive properties [2], and
ionic conductivity [3] due to the electronic
interaction between the metal ions and the ligands in
the polymer chain. In this presentation I introduce
biochemical applications of metallo-supramolecular
polymers [4].
The polymer chains of metallo-supramolecular
polymers are regarded as polycation because
cationic metal ions are introduced in the main chain.
On the other hand, DNA chains are polyanion with
many phosphates. Therefore, ionically strong
conjugation is expected between the polymer and
DNA. In our previous papers [5] we have already
reported strong binding affinity between the polymer
and DNA and cytotoxicity of the polymer to cancer
cells. Unlike mono-metal complexes such as
cisplatin, which causes intercalation, it is anticipated
that the polymer chain is conjugated with DNA
chains by groove binding. If the conjugation is
groove binding, the helical structure of
metallo-supramolecular polymer will accelerate the
binding affinity to helical DNA. In order to reveal
the influence of helicity in the polymer to DNA
binding, water-soluble helical Fe(II)-based
metallo-supramolecular polymers were designed.
The helical polymers ((P)- and (M)-polyFe) were
prepared by 1:1 complexation of Fe(II) ions and
bis(terpyridine)s bearing a (R)- and (S)-BINOL
spacer, respectively. Then, the binding affinity to
calf thymus DNA (ct-DNA) was investigated by
titration experiments in the UV-vis. spectral
measurement. As the result (P)-polyFe with the
same helicity as B-DNA showed 40-fold higher
binding activity (Kb = 13.08 107 M
-1) to ct-DNA
than (M)-polyFe. Unique rod-like images of the
DNA conjugate with (P)-polyFe were also observed
using atomic force microscopy measurement
probably due to the rigid binding between DNA
chains and the polymer. Interestingly, differences in
polymer chirality lead to significantly different
cytotoxicity levels in A549 cells. (P)-PolyFe
showed higher binding affinity to B-DNA and much
higher cytotoxicity than (M)-polyFe.
Acknowlegment
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·8
This research was financially supported by JST-CREST
project.
1. M. Higuchi et al., Chem. Rec., 7, 203 (2007); Adv.
Mater., 19, 3928 (2007); J. Am. Chem. Soc., 130,
2073 (2008); Chem. Asian J., 8, 76 (2013); ACS
Appl. Mater. Interfaces, 6, 9118 (2014); J. Mater.
Chem. C, 2, 9331 (2014); ACS Appl. Mater.
Interfaces, 7, 18266 (2015); ACS Appl. Mater.
Interfaces, 7, 25069 (2015); J. Mater. Chem. C, 1,
3408 (2013); Eur. J. Inorg. Chem., 2014, 3763
(2014); J. Am. Chem. Soc., 133, 1168 (2011).
1. M. Higuchi et al., Chem. Commun., 48, 4947
(2012); Chem. Commun., 49, 5256 (2013); ACS
Appl. Mater. Interfaces, 7, 19034 (2015); J.
Mater. Chem. C, 3, 12186 (2015); J. Mater.
Chem. C, 4, 1594 (2016).
2. M. Higuchi et al., J. Mater. Chem. A, 1, 9016
(2013); J. Mater. Chem. A, 2, 7618 (2014); Chem.
Commun., 51, 11012 (2015); RCS Advances, 5,
49224 (2015); J. Mater. Chem. A, 4, 4398 (2016);
ACS Appl. Mater. Interfaces, 8, 13526 (2016).
3. U. Rana, C. Chakraborty, R. K. Pandey, M. D.
Hossain, R. Nagano, H. Morita, S. Hattori, T.
Minowa, M. Higuchi, Bioconjugate Chem., 27,
(2016) accepted for publication; C.-Y. Hsu, T.
Sato, S. Moriyama, M. Higuchi, Eur. Polym. J.,
83, 499 (2016).
4. J. Li, Z. Futera, H. Li, Y. Tateyama, M. Higuchi,
Phys. Chem. Chem. Phys., 13, 4839 (2011); J. Li,
T. Murakami, M. Higuchi, J. Inorg. Organomet.
Polym. Mater., 23, 119 (2013).
A08: Novel Properties of Bacterial Flagellar
Motor Revealed by Analyses of Motile
Pseudorevertants
Kenji Oosawa1, Shuichi Nakamura
2, Seishi Kudo
2
1Division of Molecular Science, Faculty of Science and
Technology, Gunma University, Kiryu, Japan
Email:[email protected], web site:
http://seibutsu-butsuri.chem-bio.st.gunma-u.ac.jp/index.ht
ml
2Department of Applied Physics, Faculty of Engineering,
Tohoku University, Sendai, Japan
Bacterial flagellum is a biological
nanomachine that makes possible for a cell to swim
vigorously. The flagellum consists of three different
parts with distinct functions. The basal body acts as
a rotary motor, the long helical filament works as a
helical propeller to push the cell, and the hook
connects the basal body and the filament. Since the
flagellar motor is a unique rotary machine related
with cell movement, it is very interesting to figure
out a mechanism of rotation. Though a number of
analyses have been done in their function and
structure, it is not clear yet. To deal with these
problems, we introduced a novel strategy to analyze
their function with pseudorevertants that recovered
their function by introduction of a second mutation
into a certain kind of mutant.
In general mutant assay, most of mutations are
null and so characterization of them suggests only
loss of a function of protein. Since a detailed
characterization of protein function requires partially
defected mutants, we decided to isolate
pseudorevertants. By this strategy, we can
characterize phenotypes of pseudorevertants that
show different level of defected functions. For
example, we applied this method for analyses of
polymorphic helical shape of flagellar filaments [1].
We suggested that some common amino-acid
residues involved in determining helical shapes of
the filaments. Even though it has been known that
some mutations in flagellin caused different shapes
of the filament from a normal left-helix, a lot of
mutations themselves did not cause any changes of
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·9
shape but recovered the helical shape from a straight
filament.
We applied a similar strategy to analysis of
structure and function of FliF protein which forms
the MS ring of flagellar apparatus. Interestingly,
there were a number of pseudorevertants isolated
from a Salmonella fliF mutant, SJW3060, which
released flagellar filament from the cell and
therefore was suggested that FliF interacted with rod
proteins [2]. We isolated more than 400 mutant
strains, among them about 200 were in motAB
region and more than 100 in fliG and fliM genes.
Only five of them caused mutations in genes
encoding the rod proteins. In these cases, direct
interaction between the MS ring and the rod were
recovered by second mutations. Most of the rests
were in genes encoding the Mot proteins that form a
proton channel and part of the C ring that is involved
in flagellar assembly and motor function. Therefore,
recovery of the function of MS ring might be related
to not only structural strength of the flagellar basal
body but also rotational function of the motor.
To examine involvement of motor function in
recovery of weaken interaction between the MS ring
and the rod, we separated secondary mutations in
mot genes from the original fliF mutation in the
pseudorevertants. Most of mutants with only mot
mutation showed less motility than those of
wild-type cells in a semisolid agar plate and motility
medium. Interestingly, motile abilities of mutants
were in general better in the semisolid plate than
those in the motility medium if compared with wild
type. Next we measured swimming speeds of
mutants under a various viscosity conditions. There
were several different phenotypes shown in this
experiment. First group showed similar phenotype
with wild type that decreased its swimming speed
along increase of viscosity, second was similar with
the first one but showed smaller effect from
viscosity, third one showed almost no effect from
viscosity such as they swam with a constant speed
under different viscosities.
Here we present our results that some of the
mot mutants showed constant swimming and
rotational speed under different loads. And then
we demonstrate a possible interpretation with one
model for the flagellar motor that was proposed by
Hayashi and F. Oosawa.
1. F. Hayashi H. Tomaru, E. Furukawa, K. Ikeda, H.
Fukano & K. Oosawa, J. Bacteriol., 195, 3503
(2013).
2. H. Komatsu, F. Hayashi, M. Sasa, K. Shikata, S.
Yamaguchi, K. Namba & K. Oosawa, Biophys.
Physicobiol., 13, 13 (2016).
A09: Photoelectron Work Function
Measurements of Silver Based Contact Materials
Using the Fowler Formula
Mohamed Akbi 1,2,3
1Physics Department,
National Preparatory School for
Engineering Studies, Rouiba (Algiers), Algeria. 2Physics Department, M’hamed Bouguerra University of
Boumerdes, Boumerdes, Algeria. 3Fundamental and Apply Physics Laboratory
(FUNDAPL), Saad Dahleb University of Blida 1,
Blida, Algeria
E-mails :1. [email protected]; 2. m.akbi@univ-bou
merdes.dz
Contact materials used for electrical breakers
are often made with silver alloys. Mechanical and
thermodynamical properties as well as electron
emission of such complicated alloys present a lack
of reliable and accurate experimental data. At
present, new types of contactors with longer
duration are marketed, but manufacturers do not
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·10
understand well why this improvement. Nowadays
electrical switching life of switches, relays, and
contactors reaches one million operations without
failures.
The purpose of this work is to present the
development of a method for measuring
photoelectric work functions of contact materials.
Also reported in this paper are the results of
experimental work whose purpose has been the
buildup of a reliable photoelectric system and
associated monochromatic ultraviolet radiations
source, and the photoelectric measurement of the
EWF of silver based contact materials [1]. As a first
test of the experimental Ultra High Vacuum setup,
the electron work functions (EWF) of silver contacts,
namely polycristalline metals that are actually used
in relays, were measured photoelectrically, using the
Fowler Formula. Thus, both Fowler‟s method of
isothermal curves and linearized Fowler plots were
applied. Ulrahigh vacuum techniques were
employed to obtain residual gas pressure of about
5x10-9 mbar that allows accurate and reliable
photoelectric work function measurements [2].
The EWF measured at room temperature of
polycrystalline Ag contact (as commercially
available) stabilized at the vicinity of 4.26 eV after
several vacuum at 530 and 780 K, as shown in
Figure 1. This shows that the experimental method is
valid and the experimental setup is usable.
Furthermore, the experimental method has been
tested for pure metals, and then has been applied to
some silver alloys and silver pseudoalloys [3].
Results about silver based contacts show a
large dependence of the EWF with the preparation
of contact surface. Moreover, by heating alloy and
pseudoalloy contacts in ultra high vacuum, we have
observed large variations of electron work function,
which result of material component vaporization by
sheets. Observations by scanning electron
microscope and surface analyses by X-ray energy
dispersive spectroscopy, produce proves of the
phenomenon [4].
Fig1. Fowler isothermal curve of the outgassed virgin
silver contact, in high vacuum, at various
temperatures.
1. M. Akbi, IEEE Transactions on Components,
Packaging and Manufacuring Technology
TCPMT 4, 1293(2014).
2. M. Akbi and A. Lefort, J. Phys. D, Appl. Phys.
31, 1301 (1998).
3. M. Akbi, A. Bouchou, M. ferhat-Taleb, Vacuum
101, 257 (2013).
4. M. Akbi, A. Bouchou, N. Zouache, Applied
Surface Science 303, 131 (2014).
A10: Non-Unitary Effects Mitigation for
Few-Mode Fiber Transmission Systems
El-Mehdi Amhoud, Ghaya Rekaya-Ben Othman,
Yves Jaouen
Télécom ParisTech, Université Paris-Saclay
Email: [email protected]
The last twenty years have known an
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·11
exponential demand for network bandwidth. This
growth was
mainly caused by the build-out of the Internet and
the growing traffic generated by an increasing
number of users [1]. Since WDM systems are
approaching the nonlinear Shannon limit, intensive
research is carried on Space-division Multiplexing
(SDM) as the last degree of freedom in optical fibers
in order to feed the ever hungry demand [1]. SDM
can be realized through multimode fibers (MMFs),
that allow the propagation of more than one spatial
mode or multicore fibers (MCFs), where each core
can be single mode or multimode. Propagating
modes in MMFs are affected by a non-unitary
crosstalk known as mode dependent loss (MDL)
arising from fiber imperfections and optical
components. The presence of MDL is detrimental
for the capacity and the reliability of SDM systems
[1,2]. We propose a combination of optical and
signal processing solutions to completely mitigate
the impact of MDL in SDM transmission systems.
The accumulated MDL depends on the number
and nature of fiber spans. Strong coupling fibers
were proved to reduce the detrimental impact of
MDL by continuous mixing of modes during
propagation. In this case, the accumulated MDL
scales with the square root of the number of fiber
spans [3]. Placing random mode scramblers between
fiber slices was shown to add extra coupling and
thus MDL is reduced [4]. We propose in this work a
deterministic mode scrambler that permutes the less
attenuated modes with the most attenuated modes
[5]. This strategy allows reducing the total MDL
with only a small number of scramblers deployed in
the optical line. In Fig.1a, we show the probability
distribution function (PDF) of the average MDL for
different scrambling strategies for a 3-mode fiber.
From the figure, we notice that for an MDL of 10dB,
the proposed scrambling strategy reduces MDL to
3dB compared to 6dB with randomly scrambling
modes.
A signal processing solution based Space-Time
(ST) coding was also proved to be efficient for MDL
mitigation [6]. The principle of ST coding is to send
a linear combination of all information symbols on
all modes hence they experience different
attenuations. We compare the performance of
existing ST codes already known for wireless
communications through numerical simulations; we
derive a theoretical study of the error probability
upper bound and show the importance of orthogonal
codeword differences in absorbing the impact of
MDL. We also derive a design criterion for ST codes
construction suitable to the optical channel.
For a 3-mode fiber system, the gain brought by
placing 6 deterministic mode scramblers in the line
is 4.8 dB at BER 10-3 (Fig. 1b), by using ST coding
the gain is 4dB. Moreover, by combining both ST
and deterministic mode scrambling, MDL is
completely absorbed which is not the case when ST
coding is combined to random mode scrambling.
Accordingly, few deterministic scramblers can be
placed mainly after optical amplifiers to reduce
MDL.
Fig.1 Performance evaluation pf a 3-mode SDM system
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·12
1. P. J. Winzer and G. Foschini, Opt. Exp., 19 (2011)
2. C. Antonelli; A. Mecozzi, Opt. Exp., 23, (2015).
3. K. Ho and J. Kahn, Opt. Exp., 19, (2011).
4. S. Warm and K. Petermann, Opt. Exp., 21, (2013).
5. El-Mehdi Amhoud, Y. Jaouën and G. Rekaya-Ben
Othman, SPPcom‟16, paper SpTu3F.2, July (2016)
6. E. Awwad, G. Relaya-Ben Othman and Y. Jaouën,
J. Ligthwave Technol; LT-33, pp. 5084-5094
(2015).
A11: Single Blood cell imaging by lens free chip
microscopy
Rainer Riesenberg
Leibniz Institute of Photonic Technology, Jena, Germany
Email: [email protected], [email protected]
Cells are typically imaged by an optical
microscope with the help of fluorescent techniques
or phase contrast microscopy including staining. If it
should be imaged living cells in native solution a
marker and staining free technique becomes
necessary. So it is referred on living human blood
cells using phase contrast microcopy. These cells are
red blood cells as well as white blood cells with its
subtypes, neutrophils, lymphocytes and so on.
Therefore it is presented a new set-up, too, a
digital holographic microscope. The very simple
set-up consists of a laser diode of a pointer as light
source, a pinhole to generate a sufficient spatial
coherence, a microfluidic chip for guiding the blood
samples and an image sensor. The image sensor
records digital holograms at video rate. The pictures
we get by reconstruction using special algorithm.
This set-up can be used for point of care diagnostics.
The set-up is applied together with a notebook or a
smart phone. Many necessary functions and features
of an optical microscope are realized numerically: a
quasi 3D single exposure imaging, numerical
adaption of arbitrary thick sample carriers and to
mixtures of different refractive indices, video
tracking with the help of a laser pointer diode.
Results are demonstrated on all types of
human blood cells.
Fig1. Human white bloods cell with its nucleus,
one image of the 3D image set (left) and
red blood cell from different viewing angles (right)
1. M. Kanka und R. Riesenberg, Opt. Lett., 40, Nr.
5, S. 752–755 (2015).
2. R. Riesenberg und M. Kanka, Opt. Lett., 39, Nr.
17, S. 5236–5239 (2014).
3. R. Riesenberg, M. Kanka, und G. Mayer in SPIE
BiOS, 89510B (2014).
4. M. H. Jericho, H. J. Kreuzer, M. Kanka, und R.
Riesenberg, Appl. Opt., 51(10), 1503 (2012).
5. M. Kanka, R. Riesenberg, P. Petruck, und
Christian Graulig, Opt. Lett., 36 (18), 3651
(2011).
6. M. Kanka, A. Wuttig, C. Graulig, und R.
Riesenberg, Opt. Lett., 35 (2), 217 (2010).
7. M. Kanka, R. Riesenberg, und H. J. Kreuzer,
Opt. Lett., 34 (8), 1162 (2009).
8. M. Kanka und R. Riesenberg in Proc. SPIE 6631,
66311K (2007).
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·13
A12: Design of Silica Optical Fibers with
Enlarged Core Diameter for Few-Mode
Applications of Laser-Based Data Transmission
Anton Bourdine1
1Department of Communication Lines, Povolzhskiy State
University of Telecommunications and Informatics (PSUTI),
Samara, Russia
Email: [email protected] [email protected] ,
web site: http://www.psuti.ru
High bit rate laser-based data transmission
over silica optical fibers with enlarged core diameter
in comparison with standard singlemode fibers
(SMFs) is found variety infocommunication
applications. Since IEEE 802.3z standard was
ratified on 1998 [1] this technique started to be
widely used for short-range in-premises distributed
multi-Gigabit networks like in-building structural
cable systems (SCS), local area networks, SCS of
data and computing centers, storage area networks
etc., which are based on silica multimode optical
fibers (MMFs) 50/125. Nowadays it becomes to be
in demand for on-board and industrial network
applications requiring 1Gps and more bit rates over
MMFs with much enlarged core diameter up to 100
m [2], as well as this technique is also considered
as an alternative solution for new-generation
transport networks providing extra-high bit rates of
hundreds Tbps and more [3]. Here nonlinear effects
occurring in standard silica SMFs during
propagation of optical signals grouped by DWDM
systems with narrow channel spacing become the
main issue [4, 5], and a passage to enhancing of
fiber effective area by core diameter enlargement is
one of the obvious methods for decreasing or even
suppression of optical fiber own nonlinearity.
Because emission from the conventional
laser-source may contain from only one fundamental
mode, as well as up to 5…6 transversal modes
depending on laser type (DFB / LD / VCSEL), only
several guided modes with particular orders would
be excited in optical fiber with enlarged core
diameter. Here optical signal propagates over those
fibers in a so-called few-mode regime [1], and
differential mode delay (DMD) becomes the main
linear distortion effect for few-mode fiber optic links.
This work presents an alternative method for design
special refractive index profiles of silica few-mode
fibers (FMFs) with enlarged core diameter. Here
some results are presented concerning with
refractive index profile synthesis for FMFs with
effective mode area more 140 m2 and low DMD for
transport networks, as well as DMD curves
corresponding to profiles for MMFs 50/125 and
100/125 for in-premises and on-board/industrial
cable systems.
Fig1. DMD curves over “C”-band for two synthesized
samples of silica 6-LP-modes FMF 22/125 profiles
Fig2. DMD curves over “O”-band for reference and
synthesized samples of MMF 100/125 profiles
The reported study was funded by RFBR according to the
research project No. 16-37-60015 mol_a_dk and by
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·14
Grant of the President of Russian Federation, research
project No. MD-9418.2016.8
1. S. Bottacchi, Multi-Gigabit transmission over
multimode optical fibre. Theory and design
methods for 10GbE systems (John Wiley &
Sons Ltd.), 654 (2006).
2. E. Olson, Military and Aerospace Electronics 5
(2016).
3. D.J. Richardson et al., Nature Photonics 7, 354–
362 (2013).
4. R.-J. Essiambre et al., IEEE Journal of
Lightwave Technology 28(4), 662 – 701 (2010).
5. A. Mecozzi et al., IEEE Journal of Lightwave
Technology 30(12), 2011 – 2024 (2012).
A13: Offset-Frequency-Spaced Two-Tone Optical
Coherent Detection Scheme of Radio-over-Fiber
Signal and Its Polarization Diversity Technique
Toshiaki Kuri1, Takahide Sakamoto1
1Network System Research Institute, National Institute of
Information and Communications Technology, Koganei,
Tokyo, Japan
Email:{kuri, tsaka}@nict.go.jp
We have proposed a
laser-phase-fluctuation-insensitive optical coherent
detection scheme assisted by a digital signal
processing technique for radio-over-fiber (RoF)
systems [1, 2]. In this system, a “two-tone” local
light is used for an individual optical coherent
detection of both the carrier and the modulated
components of RoF signal, where a frequency
separation of two-tone local light is different from
that of the RoF signal, which is called
“offset-frequency-spaced”. In the demonstration of
our schemes, the state-of-polarization (SOP) of the
received RoF signal and the two-tone local light was
manually matched to get the maximum output after
the photo-detection. However, the SOP mismatch is
the essential problem for the optical coherent
detection. To overcome this problem, polarization
diversity is an important technique. Here, we are
thinking that there are some polarization diversity
techniques, which are applicable to our optical
coherent detection scheme. Recently, a combination
technique of constellations recovered from two
orthogonal polarization components has been newly
proposed as one of polarization diversity techniques
in offset-frequency-spaced two-tone optical coherent
transmission of radio-over-fiber signal [3], as shown
in Fig. 1. With this technique, successful
combination of 10-Gbaud
quadrature-phase-shift-keying constellations
recovered from two orthogonal polarization
components after 20-km standard single-mode fiber
transmission is experimentally demonstrated for
some SOPs and the transmission quality is also
evaluated. As a result, it is shown that the
polarization diversity effect can be maintained.
Fig1. Fundamental block diagram of proposed
polarization diversity technique.
1. T. Kuri, T. Sakamoto, G.-W. Lu, and T.
Kawanishi, “Laser-phase-fluctuation-insensitive
optical coherentdetection scheme for
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·15
radio-over-fiber system,” IEEE/OSA J.
Lightwave Technol., vol. 32, no. 20,
pp.3803-3809 (2014).
2. T. Kuri, T. Sakamoto, and T. Kawanishi,
“Laserphase-fluctuation-insensitive optical
coherent transmission of
16-quadrature-amplitude-modulation
radio-over-fiber signal (Top Scoring Paper),”
IEEE/OSA J. Lightwave Technol., vol. 34, no. 2,
pp.683-690 (2016).
3. T. Kuri, T. Sakamoto, and T. Kawanishi,
“Recovered-constellation combining for
polarization-insensitive offset-frequency-spaced
two-tone optical coherent detection scheme in
radio-over-fiber systems,” Proc. OECC2015,
JMoD.44, Shanghai (2015).
A14: Synchronized Pulse Optical Cavities and
their Applications in Nonlinear and Quantum
Optics
Bhaskar Kanseri
Department of Physics, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi-110016, India
Email:[email protected], web site:
http://web.iitd.ac.in/~bkanseri
Synchronized pulse optical cavities refer to those
optical resonators which operate in pulsed regime
and thus are having well defined mode properties in
time domain. Here, the cavity length has to be
chosen such that the roundtrip time is an integer
multiple of the spacing of the pulses, i.e. cavity
needs to be „synchronized‟ with the input pulsed
source. In addition, an interferometric stabilization is
required between the cavity and the input field. In
the frequency domain, this implies a complete
overlap of the laser frequency combs (all the lines of
the laser output) characterizing the mode locked
laser pulse with the spectral modes of the cavity, so
that all the lines of the frequency comb can be
resonant simultaneously [1].
Such optical cavities in pulsed domain have
found several applications in nonlinear optics. They
have been used in non-linear frequency conversion
of femtosecond/picosecond laser pulses [2]. Such
cavity effect on pulsed radiation increases the
efficiency of such frequency conversion by
manifolds. For instance, as shown in Fig.1, recently
we have experimentally demonstrated a frequency
doubling efficiency of 53% for weak infrared
femtosecond pulses at 1.4 nJ/pulse energy using a
BIBO crystal placed in a synchronized pulse optical
cavity working at 78 MHz. The cavity losses, mode
matching and impedance matching were also studied
using a simple SHG model, showing reasonably
good agreement between theory and experiment [3].
Fig1. Realisation of a synchronized pulse optical cavity
for second harmonic generation of weak femtosecond
pulses using a BIBO crystal placed inside the cavity. For
notations and other details pl. refer to [3].
The synchronized pulse optical cavities are also
important in the area of quantum optics, where they
could work as a short-time memory device, storing a
weak pulse containing few photons for timescales
ranging from several nanoseconds to several
milliseconds. Thus one can store any quantum state
(say single photon) inside such cavity and can
extract it after certain time duration in the multiples
of cavity roundtriptime, essentially using the cavity
as a controllable delay line. For handling reasons,
not only realisation of such cavities require high
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·16
repetition rate pulses (so that the cavity size could be
small), but also highly reflective optics and lossless
active insertion-extraction mechanism. One can
employ synchronized pulse optical cavities to
approximate an on demand quantum source, for
Fock state generation and for the realization of all
cavity Schrödinger cat state [4] for quantum
information applications.
1. R.J. Jones, J. He, Opt. Lett. 29, 2812 (2004).
2. H. Carstens et al, Opt. Express 21, 11606 (2013).
3. B. Kanseri, M. Bouillard and R. Tualle-Brouri,
Optics Communications 380, 148 (2016)
4. J. Etesse, M. Bouillard, B. Kanseri and R.
Tualle-Brouri, Phys. Rev. Letts. 114, 193602 (2015).
A15: Rare-earth doped integratable micro-nano
materials and devices
Jiaming Liu, Hao Zhang, Jian Lin, Wenxiu Li, Xia
Xu, Anping Huang, Zhisong Xiao*
Key Laboratory of Micro-nano Measurement,
Manipulation and Physics (Ministry of Education),
School of Physics and Nuclear Energy Engineering,
Beihang University, Beijing 100191, China
*Corresponding author: [email protected]
Materials and devices based on rare-earth have
attracted substantial attention and achieved great
successes in the past decades due to their important
potential applications in several areas, such as
optical communications, infrared detection, medical
imaging, sensing, solid state lasers and displays.
Particularly, erbium-doped fiber amplifiers have
been extraordinarily successful in broad optical gain
around 1.5~1.6μm. Devices integration decreases the
overall size and cost. It allows for the combination
of many functions on chip. Optical waveguide is
used in most integrated optic devices to confine and
guide light in higher refractive index channels. In
this article we review the various rare-earth doped
materials and devices for broadband and visible to
mid-infrared light emission.
A16: Possibility of application the MIMO
technique in VLC systems
Marcin Kowalczyk1
1 Institute of Telecommunications, Warsaw University of
Technology, Warsaw, Poland
Email:[email protected], web site:
http://www.elka.pw.edu.pl/eng
Rapidly growing share of LED lighting in
world market opens new possibilities in the context
of introduction a new kind wireless transmission
based on this type lighting, known as visible light
communications (VLC) [1-5]. However, due to the
fact that modulation bandwidth of common LEDs,
which are used for lighting purpose, is typically no
more than couple or dozen MHz, it is necessity to
find a way, which can ensure that the data
transmission throughput in such systems, will be on
a level, which is normally expected today or higher.
This means in practice that additional techniques
like spectrally effective formats of modulation must
be used, if we want ensure a suitable data throughput
in the such systems. Because, typically for lighting
purpose of space in the same time is used more than
one LED bulb, the MIMO technique can be applied
for this purpose also [6-8]. Using this technique can
have also additional benefits, not only in the context
of providing higher bit rate, but also increasing of
coverage as well as service more devices in the same
time can be obtained. The possibility of using of
MIMO technique at VLC systems was considered in
this paper, based on the mathematical model.
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·17
1. 802.15.7-2011-IEEE Standard for Local and
Metropolitan Area Networks--Part 15.7:
Short-Range Wireless Optical Communication
Using Visible Light
2. J. Vucic, 513 Mb/s Visible Light
Communications Link Based on
DMT-Modulation of a White LED, IEEE/OSA J.
Lightwave Tech, 28 (24), 3512-3518 (2010)
3. Giustiniano, D., Tippenhauer, N.O. and Mangold,
S., Low-complexity Visible Light Networking
with LED-to-LED communication, Conference
IFIP Wireless Days (WD) 2012, 1-8 (2012)
4. Komine, T. and Nakagawa, M., Fundamental
Analysis for Visible-Light Communication
System using LED Lights, IEEE Transactions on
Consumer Electronics, 50 (1), 100-107 (2004)
5. H. Haas, Visible Light Communication, in
Optical Fiber Communication Conference, OSA
Technical Digest (online), Tu2G.5.(2015)
6. Azhar, Ahmad Helmi, T. Tran, and Dominic
O'Brien. A Gigabit/s indoor wireless transmission
using MIMOOFDM visible-light
communications, IEEE Photonics Technology
Letters, 25 (2), 171-174 (2013)
7. M. Kowalczyk, 2 × 2 MIMO VLC Optical
Transmission System Based on LEDs in a
Double Role. ACTA PHYSICA POLONICA A,
130 (2016), 41-44 (2016)
8. M. Kowalczyk, Modeling of multi-channel
MIMO-VLC systems in the indoor environment ,
Proc. SPIE 10031, Photonics Applications in
Astronomy, Communications, Industry, and
High-Energy Physics Experiments 2016,
doi:10.1117/12.2247468;
http://dx.doi.org/10.1117/12.2247468
A17: Uplink Design for VLC systems Employing
Infrared Wireless Links
Mohammed T. Alresheedi1, Ahmed Taha Hussein
2
and Jaafar M. H. Elmirghani 2
1Department of Electrical Engineering, King Saud
University, Riyadh, Kingdom of Saudi Arabia,
2School of Electronic and Electrical Engineering,
University of Leeds, Leeds LS2 9JT, UK
The large and continuous growth in mobile
devices including smart phones, laptops, and
Internet of Things (IoT) devices is driving a huge
demand for data access to wireless networks. Visible
light communication (VLC) is becoming more
popular everyday due to its inherent advantages over
radio frequency (RF) systems. Although VLC
systems provide lighting and communications
simultaneously from LEDs, the uplink channel
design in such a system is challenging task. This is
due to the energy limitations of mobile devices
(where such light does not need to be generated for
illumination) and also due to the potential glare from
the light where VLC signals can cause discomfort to
human eyes and affect the indoor illumination.
In this paper, we introduce a solution in which
the uplink challenge in indoor VLC is resolved by
the use of an Infrared (IR) link. We propose a new
fast adaptive beam steering IR system (FABS-IR) to
improve the uplink performance at high data rates
while providing security for applications. The goal
of our proposed system is to enhance the received
optical power signal and mitigate the channel delay
spread when the system operates at a high
transmission rate. The channel delay spread is
minimised from 0.22 ns given by hybrid diffuse IR
link to almost 0.07 ns. At 1.25 Gb/s, our results
show that the imaging FABS-IR system
accomplished about 14.7 dB signal to noise ratio
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·18
(SNR) in the presence of multipath dispersion,
receiver noise and transmitter mobility.
Fig. 1 The channel delay spread of our proposed
systems employing non-imaging and imaging
receiver, when the transmitter moves along the x=1m
line.
Fig. 2 The SNR results of our proposed systems
imaging HCD-IR with total transmit power Pt= 1 W
and imaging FABS-IR with Pt=150 mW, when
ransmitter operates at 1.25 Gb/s and moves along
x=1m while the receiver is fixed at the centre of the
ceiling.
A18: First in-orbit verification of space laser
communications for micro-satellites and
LEO-to-ground polarization measurements at
1.5-μm wavelength
Morio Toyoshima1
1Space Communications Laboratory, Wireless Networks
Research Center, National Institute of Information and
Communications Technology (NICT), 4-2-1, Nukui-Kita,
Koganei, Tokyo 184-8795 Japan
Email: [email protected], web site: http://www.nict.go.jp
National Institute of Information and
Communications Technology (NICT) has
successfully conducted several laser communication
experiments between geostationary earth orbit (GEO)
and low earth orbit (LEO) satellites and optical
ground stations (OGSs). To date other
organizations have also conducted many space laser
communication demonstrations worldwide and the
time has come when space laser communications
can be used as operational systems. NICT
developed the Small Optical TrAnsponder (SOTA)
to make it suitable for usage onboard micro-satellites
[1]. The development of systems for high-speed
data transmission between low-earth-orbit (LEO)
satellites and terrestrial sites is expected to be
powerful communications means in the future.
Space Optical Communications Research
Advanced Technology Satellite (SOCRATES),
which mass is 50-kg-class, embarked with the
SOTA and the small camera simultaneously and was
launched on May 24th, 2014 by the H-IIA launcher.
After the checkouts of the satellite bus systems and
the SOTA mission, laser communication
experiments were conducted with 10-Mbps/1-Mbps
optical downlinks from the 50-kg-class
micro-satellite with the NICT 1-m diameter OGS
telescope.
Fig. 1. SOTA proto-flight model (left: optical part; right:
electrical part).
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·19
Figure 1 shows the optical and electrical parts
of the SOTA proto-flight model. There are four laser
beams: a 0.98-μm communication laser (Tx 1), two
laser beams for quantum key distribution (QKD) (Tx
2 and Tx 3), and the 1.55-μm communication laser
(Tx 4) in the SOTA. There are two sensors for
acquisition and tracking. The fine pointing
mechanism (FPM) is implemented in Tx 4. The
images taken by the onboard small camera were
successfully downloaded via the optical link on June
3rd, 2015, which was the world first data
transmission from 50-kg-class micro-satellites via
laser communication links [2].
NICT also plans to conduct basic satellite
QKD experiments [3]. The quantum bit error ratio
(QBER) is the most important parameter for QKD
and can be evaluated from the number of counts
measured by the single photon counting modules
(SPCMs). If linear polarized laser beams are
transmitted from the SOTA onboard the
micro-satellite, the polarized laser pulses can be
measured by SPCMs on the ground and the
polarization analysis will be conducted. Before the
basic satellite QKD experiments with SPCMs, NICT
has successfully conducted the first measurement of
a linearly-polarized laser source in space at 1.55-μm
using a QKD-like receiver on the ground installed in
the NICT 1.5-m diameter OGS telescope.
1. M. Toyoshima, H. Takenaka, Y. Shoji, Y.
Takayama, Y. Koyama, and M. Akioka,
CSNDSP10, OWC-10, Northumbria University,
United Kingdom, July 21-23 (2010).
2. http://www.nict.go.jp/press/2015/06/03-2.html
3. M. Toyoshima, T. Sasaki, H. Takenaka, Y.
Takayama, Y. Koyama, M. Fujiwara, and S.
Sasaki, Trans. JSASS Aerospace Tech. Japan, 10,
pp.Pj_9-Pj_15 (2012).
4. A. C.-Casado, H. Kunimori, H. Takenaka, T.
Kubo-Oka, M. Akioka, T. Fuse, Y. Koyama, D.
Kolev, Y. Munemasa, and M. Toyoshima,
OPTICS EXPRESS, 24, 12254–12266, (2016)
A19: Digital Signal Processing in Optical
Inter-Satellite Link Receivers
Werner Rosenkranz1, Semjon Schaefer
1
1Christian-Albrechts-Universität zu Kiel, Chair for
Communications, Kaiserstraße 2, D-24143 Kiel,
Germany
Email: [email protected].Þ
Due to higher data rates, lower power
consumption and higher data security, optical
inter-satellite links (OISL) offer an attractive
alternative to conventional RF-communication. For
example OISLs enable near real-time earth
observations in a LEO (low earth orbit) to GEO
(geostationary earth orbit) data relay configuration
(see Fig. 1a), which require high-speed
communication links between satellites in different
orbits and between satellites and earth. Due to the
very high distances of up to 45,000 km the design of
the optical receivers needs to enable very high
receiver sensitivities which requires careful carrier
synchronization and a quasi-coherent detection
scheme (Fig. 1b). In state of the art systems a
homodyne detection scheme uses an optical
phase-locked loop (OPLL), typically in a
Costas-loop configuration, to adjust the frequency
and phase of the local laser to the incoming signal.
However, the OPLL hardware complexity
increases with the modulation order. Therefore,
applying an intradyne detection scheme, where the
local laser at the receiver runs un-synchronized and
frequency offset and phase noise compensation is
done by digital signal processing after the optical
front end, seems to be a possible alternative for
future OISL systems.
We present a comparison of homodyne and
intradyne detection schemes for high-order
modulation formats in optical inter-satellite
communication systems. The homodyne detection
based on OPLL techniques is numerically
investigated for BPSK and QPSK in terms of
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·20
frequency acquisition and data demodulation. We
compare this scheme with intradyne detection based
on digital frequency offset and phase noise
compensation as an approach for future flexible
software defined systems. We explain the applied
algorithms and present numerical simulations in
terms of receiver sensitivity and compare the
receiver complexity of both schemes. Finally, we
show that digital frequency offset compensation is a
promising solution in OISL for increasing the data
rate and lowering laser linewidth requirements as
well as acquisition time.
Fig1. OISL scenario (a), OISL BPSK transmission
system (b).
A20: Kerr Combs in Microresonators:
Harmonizing Chaos into Solitons
M. L. Gorodetsky1,2
, V. E. Lobanov1, G. V.
Lihachev1,2
, N. G. Pavlov1,2
, A. V. Cherenkov1,2
1 Russian Quantum Center, Moscow, Russia
Email:[email protected], web site:
http://www.rqc.ru/members/michael.gorodetsky
2 Physics Department, Moscow State University, Moscow,
Russia 3 Moscow Institute of Physics and Technology,
Dolgoprudny, Russia
Optical frequency combs revolutionized
metrology and experimental physics and were
marked by Nobel Prize in 2005 (J.Hall, T.Hänch).
The advent of microresonator based Kerr combs [1]
opens a path to novel applications where traditional
combs requiring bulky apparatus cannot be used. In
this case, frequency comb is formed spontaneously
in optical ring-type or whispering gallery
microresonator in four-wave mixing cascaded
processes. Though initial expectations were
somewhat mitigated by intrinsic chaotic character of
first generation combs [2], it was shown than
coherent mode-locked combs associated with
solitons are still possible without significant
additional efforts on different platforms [3, 4]. Key
advantages of microresonator based frequency
combs are their compact form factor, high power per
comb line, and ability to access microwave
repetition rates, relevant for many application
including high capacity telecommunications or
microwave photonics. It was also revealed that
coherent Kerr combs are possible not only for
anomalous group velocity dispersion necessary for
bright optical solitons but also in normal dispersion
systems using the so-called “platicons” – solitonic
like flat-toped waveforms [5]. This opens the ability
to generate coherent combs in the UV or mid IR
spectral range with the gain bandwidth limited only
by the transparency window. Dynamical probing of
soliton states allows for controlled switching and
locking of multiple soliton states down to single
soliton per roundtrip mostly convenient for
applications [8]. Moreover, slow frequency tuning
of the pump laser augmented with phase or
amplitude modulation corresponding to the free
spectral range of the microresonator provides
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·21
reliable convergence of initially excited chaotic
comb to mode locked single-soliton state.
The support by Ministry of Education and
Science of the Russian Federation, project
RFMEFI58516X0005 is acknowledged.
Fig1. Field distribution evolution inside disc
microresonator upon slow laser frequency
relative tuning 0 augmented with phase
modulation. Transition from chaotic state to
soliton state is clearly seen.
1. P. Del‟Haye et al., Nature 450, 1214–1217
(2007).
2. T. Herr et al. Nat. Photon. 6, 480–487 (2012).
3. T. Herr et al. Nat. Photon. 8, 145–152 (2014).
4. V. Brasch et al., Science 351, 357–360 (2016).
5. V. E. Lobanov et al., Opt. Express, 23, 7713
(2015).
6. H. Guo et al., Nat. Physics, advanced online
publications (2016).
A21: Advanced Radio over Fiber Network
Technologies
Seyedreza Abdollahi
ECE department, Brunel University London, UK
New wireless subscribers are signing up with
an increasing demand of more capacity for
ultra-high data rate transfer at speeds of multi Giga
bit per second, while the radio spectrum is limited.
This requirement of more bandwidth allocation
places heavy load on the current operating radio
spectrum congestion at lower microwave frequency.
Millimetre Wave (MM-Wave) communication
system offers a unique way to resolve these
problems in the coming super high data rate 5G
mobile networks.
Radio over Fibre (RoF) is the technique of
modulating the radio frequency (RF) subcarrier onto
an optical carrier for distribution over an optical
fibre network. RoF technology is currently receiving
large attention due to its ability to provide simple
antenna front ends, increased capacity, and wireless
access coverage. This technique has been considered
a cost-effective and reliable solution for the today
and the future wireless and mobile access networks
by using optical fibre with vast transmission
bandwidth capacity. It has the following main
features: (1) it is transparent to bandwidth or
modulation techniques. (2) Needs simple and small
BSs. (3) Centralized operation is possible.
RoF link is used in remote antenna
applications to distribute signals for Microcell or
Picocell base station in mobile communication
network. The downlink RF signals are distributed
from a Central Station (CS) to many Base Stations
(BSs) known as Radio Access Points (RAPs)
through the optical fibre links. The uplink signals
from mobile devices which are received at the RAPs
are sent back to the CS for any signal processing.
However, this system is analogue and in the
analogue system the bandwidth is limited by devices
performance and parasitic components introduced.
Thermal noise generated in active and passive
components limits the dynamic range of the system.
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·22
Digital signal processing has revolutionized modern
communication systems by offering unprecedented
performance and adaptivity. Since digital systems
are flexible and more conveniently interface with
other systems, and are more reliable and robust
against additive noises of devices and channel and
achieve better dynamic range than the analogue
systems.
Data converters such as Analogue-to-Digital
and Digital-to-Analogue Converters (ADCs and
DACs, respectively) are the link between the
analogue and the digital world of signal processing
and data handling. Wideband analogue to digital
conversion is a critical problem encountered in
broadband communication and radar systems. The
recent electronic analogue to digital conversion
systems experience problems such as jitter in
sampling clock, settling time of the sample and hold
circuit, speed of comparator, mismatches in the
transistor thresholds and passive component values.
These limitations imposed by all of these factors
become more severe at higher frequencies.
Photonics data converters by using the Mode-locked
laser (MLL) and electro-optical Modulator are able
to scale the timing jitter of the laser sources to the
sub-femtosecond level, which will allow the
designers to push the resolution bandwidth by many
orders of magnitude beyond what electronic
sampling systems can achieve currently.
The fully Photonic Digital-RoF (PD-RoF) link
using photonic data converters can maintain the
dynamic range more independent than optical fibre
link distance and can employ the present
infrastructure for concurrently transporting both the
digitized radio traffic and the conventional baseband
data traffic signals through metro and access
networks using wavelength division multiplexing
technique. This technique provides following
advantages over the conventional RoF networks: 1)
Additional integration of multiple services over the
conventional optical fibre networks that significantly
reduces the cost overhead of the services for mobile
operators and consequently to the end-users. 2)
Further reduction in power consumption that saves
environment as well as energy resources. 3) Expand
the wireless covered area. 4) Reduces the
maintenance costs.
A22: Development Activity of Terahertz Power
Module with FWG-TWT
Norio Masuda, Mitsuru Yoshida, Koji Okamoto
Microwave Tubes Division, NEC Network and Sensor
Systems, Ltd., Sagamihara, Kanagawa, Japan
Email:[email protected], web site:
http://www.necnets.co.jp/en/
In the last decade, there is a strong demand for
High data rate and high capacity wireless
Communications due to rapid increase of
smartphones, tablet computers, and wireless Internet
services. To meet the demand, the efforts to expand
carrier frequency from the microwave range to the
millimeter or terahertz wave range in wireless
communication links have been actively made.
Traveling wave tube (TWT) is a key power device to
extend communication distance in
telecommunication, satellite transmitters, and
wireless communication data links. We are
developing W-band portable terahertz power
modules using Wband TWT. The TWT was
developed for transmission test of high data rate.
Slow wave circuit, which is an interaction circuit
between an electron beam and a traveling wave, is
miniaturized by using folded waveguide (FWG)
structure [1]. In figure 1, outline of the TWT is about
70 x 70 x 300 mm.
TWT is also useful for THz imaging. At the
present day, X-ray fluoroscopy systems are used to
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·23
enhance security and safety in airport or logistics
center. The rf wave based imaging has features such
as harmless to human body or photography films,
detectable materials made of light element. This time,
we have applied W-band TWT to take fluoroscopy
images of resin objects in an envelope made of
cardboard (Fig. 3). Commercially available sensor
array (Terasense model T30/64/64) was used as
W-band detector. We are trying to improve image
quality, however it is possible to distinguish objects
from the image (Fig. 4). Because of low
invansiveness, for example, THz imaging is
expected to be applied to walk through inspection.
In Japan, several terahertz projects are currently
proceeding by the Ministry of Internal Affairs and
Communications (MIC). We have started to develop
TWT and terahertz power module (TPM) of 0.3 THz
band [2]. The TWT was designed using our
experiential technology except for FWG slow wave
structure. The electron gun adopted thermal cathode,
and the collector employed single stage collector for
small velocity dispersion of electrons. For compact
and light weight, the peoriodic permanent magnet
(PPM) structure was employed for focusing the
electron beam. Presently, we are evaluating the
electron beam efficiency by a beam test tube. Our
target is to develop a portable power module of 1W
RF power.
In near future, we will try to develop prototype
of compact outdoor units and improve performance.
Acknowledgment This work was supported in part
by R&D on amplifier technology in 300 GHz band,
in apart of R&D program on key technology in
terahertz frequency bands of the MIC, Japan.
EMN DUBAI MEETING 2016 PROGRAM & ABSTRACT
ABSTRACT·24
Auther Index
Agnieszka Siemion...............................................................................................................................A 2
Anton Bourdine...................................................................................................................................A13
Bhaskar Kanseri................................................................................................................................. A15
El-Mehdi Amhoud...............................................................................................................................A10
Jirun Luo.............................................................................................................................................A 3
Kenji Oosawa...................................................................................................................................... A 8
Manish Kumar.................................................................................................................................... A 6
Masayoshi Higuchi..............................................................................................................................A 7
Mohamed Akbi....................................................................................................................................A 9
Marcin Kowalczyk..............................................................................................................................A16
Mohammed T. Alresheedi...................................................................................................................A17
Morio Toyoshima................................................................................................................................A18
Michael Gorodetsky............................................................................................................................A20
Norio Masuda.....................................................................................................................................A22
Rainer Riesenberg...............................................................................................................................A12
Seyedreza Abdollahi............................................................................................................................A21
Shin'ichiro Hayashi.............................................................................................................................A 1
Susumu Imashuku...............................................................................................................................A 4
Semjon Schaefer.................................................................................................................................A19
Takehiro Imura...................................................................................................................................A 5
Toshiaki Kuri......................................................................................................................................A14
Zhisong Xiao.......................................................................................................................................A16