high power ps – ns tunable pulse fiber laser system. andy piper1.pdf · 2013. 9. 16. · required...
TRANSCRIPT
High Power ps – ns Tunable Pulse Fiber Laser System
Presented By: Dr. Andy Piper (CTO)
4th Sep 2013
Bringing you the power of Light...
Outline
ü Overview of various Pulse Fiber Laser Technologies
ü Introduce iLuma’s ps – ns tunable Pulse Fiber Laser
ü Brief Introduction to iLuma Photonics
CONFIDENTIAL
PULSED FIBER LASER TECHNOLOGY
OVERVIEW
CONFIDENTIAL
1. Maintaining pulse duraEon (in parEcular for ultrashort pulses) ü High-‐order dispersion compensa1on
2. High Pulse Energies and High Peak Power:
ü Minimise Non-‐Linear distor1ons ü Effec1ve Mode Area vs Maintain Beam Quality ü Fiber Length
3. Require Compact and Robust components ü Compact and Low/No Maintenance ü Tightly confine guided Modes (i.e. high intensity pulses)
Challenges for Pulsed Fiber Lasers
CONFIDENTIAL
Nanosecond Regime
Picosecond Regime
Femtosecond Regime
Current Technology Platforms Used to Generate Pulses for Fiber Lasers
ü Q-Switching
ü Direct Modulation
ü Mode-locked
ü Gain-switching
TEC
HN
OLO
GY
PL
ATFO
RM
S Pu
lse
Reg
ime
ü Mode-locked
For High Power, these technologies usually employ a Master Oscillator Power Amplifier (MOPA) Configuration
CONFIDENTIAL
delay (ns)
-400 -200 0 200 400
sign
al
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.50.35 mJ0.74 mJ1.21 mJ
37 ns
ns regime: Q – Switched Pulsed Fiber Lasers
Advantages
ü Low Cost
ü Able to provide with ease > 1mJ output
pulses
Disadvantages –
ü Lower peak powers
ü Low Maximum output frequencies (<
150kHz)
ü No real time control of output pulse
parameters
OC
Single Stage Q-switch Cavity Pulse Energy - 1.2 mJ @ 10kHz
Pulse Width - 37 ns @ 10kHz Repetition rate of 10 - 100KHz
Beam quality of M2 = 1.1 A. Piper, A.Malinowski et. al. (Electronics Letters 2004 Vol.40(15) pp.928-9 )
CONFIDENTIAL
ns regime: Direct ModulaEon Pulsed Fiber Lasers
Advantages
ü Higher Output Peak Powers
ü Ability to Manipulate Pulse Parameters
in Real Time – Flexible
ü Single Shot – GHz Repetition Rates
Disadvantages
ü Usually More Expensive than Q-switch
ü Usually requires > 1 amplification stage
ü More Non-Linear distortion leading to
higher output pulse energy challenges
ü Increase production difficulty and
repeatability
Multi-Stage Direct Mod. System Pulse Energy – up to 1 mJ
Pulse Width & Repetition rate Tunable
Beam quality of M2 < 2
Modulated Seed
Pre- Amplifier/s
Power- Amplifier Fiberised-
delivery
DiodePump
Diode Pump
SIGNAL IN
SIGNAL OUT
Yb3+ Fiber
Amplifier
Splice Splice
BDO
Beam Delivery Optics
!"#$%&'()*+&#,++&#
-"#./0+1#234(/5+1,#671+#8#7%9+1#234(/5+1,"#
:"#./0+1/,+&;&+(/<+1=#9/*>#?@A#
CONFIDENTIAL
ps regime: Gain-‐switched Pulsed Fiber Lasers
Advantages
ü Electronically generated pulses < 200
ps
ü Lower cost Ultrashort Fiber Laser
ü Compact & Reliable All-Fiber solution
ü High output frequency
Disadvantages
ü Requires seeded stabilisation
ü Limited frequency tunability (integer)
ü Requires > 2 amplification stages
Gain-switched System Average Power – 11W
Pulse Width – Compressible to 18 ps (inherently 60 ps)
Repetition rate up to 1 GHz A. Piper, A.Malinowski et. al. (CLEO/QELS 2005 Baltimore 23-26 May 2005 CTuCC3)
Driving pulse:
Carriers
Optical output
CONFIDENTIAL
fs – sub ps regime: Chirped Pulse AmplificaEon (CPA) Fiber Lasers
Advantages
ü High Peak Powers (MW)
ü Ultrashort Pulses (fs – sub ps)
ü High Repetition Rates
Disadvantages
ü Expensive and Bulky footprint
ü Lower pulse energies
ü Usually Hybrid at high powers (i.e.
bulk compressors)
ü High-order dispersion compensation
ü Limited Frequency Tunability
ü Sensitive to mechanical/thermal
vibrations
ü Small scale production
Multi-Stage CPA System Mode-locked Oscillator
Average Power > 25W Pulse Width – 110 fs
Peak Power - > 3.5 MW A.Malinowski, A. Piper et. al. (Optics Letters 2004 Vol.29(17) pp.2073-5 )
!
CONFIDENTIAL
iLuma’s ps – ns tunable Pulse Fiber Laser
CONFIDENTIAL
A gap in the pulse fiber laser family
Nanosecond(ns) (10^-9 s)
Picosecond(ps) (10^-12 s)
Femtosecond(fs) (10^-15 s)
Applications / Markets:
" Marking " Precision Engr. " Ablation " Drilling " R&D " Electronics " Aerospace " Cleantech " Medtech " Welding " Military " Semiconductor
" Marking " Micro-machining " Bio-medical " Medtech " R&D " Pharmaceuticals " Cleantech " Laser display " Nanotechnology " Semiconductor
GAP To be
harnessed
Potential to access
applications from both sides and perform better
than ns systems
10 ns – 500 ps 100 ps – 1 ps 100 – 220 fs 500 ns – 10 ns
CONFIDENTIAL
INTRODUCING NEW PULSE REGIME
There is a demand for cost efficient, reliable, flexible and compact high power short pulse fiber laser system (ie hundreds
of picosecond – sub-‐nanosecond)
CONFIDENTIAL
Comparing the various technologies A^ributes Q-‐switch Direct Mod CPA Gainswitch iLuma Peak Power Low Medium Highest High High
Pulse manipula1on
No Real Time (Electronic)
No Not Real Time (Electronic)
Real Time (Electronic)
Pulse widths 10 -‐ 100 ns Up to 500 ns fs – sub ps Sub ps to 200ps 500 ps – 10ns
Max Frequency Low High High High High
Frequency manipula1on
Limited (Real Time)
Real Time Limited (integer)
Limited (integer) Real Time
Pulse Energy (to achieve 1 mJ)
Easy Medium Difficult Difficult Medium
All-‐Fiber Yes Yes No Yes Yes
Feedback Stabilisa1on
No No No Yes No
Cost Cheapest Medium Highest Medium Medium
Size Compact Compact Bulky Medium Compact
Produc1on Scalability
High High Low Medium High
CONFIDENTIAL
ILUMA’S ps – ns tunable Pulse Fiber Laser (500 ps – 10 ns)
ü 500 ps – 8 ns output pulses
ü Optimised Peak Power over pulse duration range (~ 13kW for >1 ns)
-5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
-10 10 30 50 70 90 110 130 150 170
Opt
ical
Pul
se P
eak
Pow
er (k
.W)
Time (ns)
!"#$%&
!"'$%&
(")$%&
*$%& *"#$%& +$%& )$%& ,$%& -$%&
500 ps
700 ps
8 ns
CONFIDENTIAL
Average Output Power, Pulse Energy & Peak Power
ü Average Output Power > 20W * (* > 20W not available at 500 ps yet)
ü Output Pulse Energy up to 100 uJ
ü Peak Power in excess of 30 kW ** (** Likely in excess of 50kW in the very near future)
a) Power & Energy vs Pulse width b) Peak Power vs Pulse width
0
5
10
15
20
25
30
35
40
0 1 2 3 4 5 6 7 8 9
Peak
(KW
)
Pulse width (ns) 0
0.02
0.04
0.06
0.08
0.1
0.12
18
18.2
18.4
18.6
18.8
19
19.2
19.4
19.6
19.8
20
20.2
20.4
0 1 2 3 4 5 6 7 8 9
Pow
er(W
)
Pulse width(ns)
Pulse E
nergy (mJ)
20W 100uJ
35kW
CONFIDENTIAL
Beam Profile & Power Stability
20W 21W
Output Beam Profile ü M2 = 1.63 (nominally +/- 0.1)
ü Divergence = 0.4 (< 1mrad)
ü Asymmetry = 1.11
Operating Temp. Range Stability ü < 5% (over 10 – 55 °C)
ü < 1% (at constant temperature)
CONFIDENTIAL
Possible Market Applications
ü Black Marking Anodised AL, Recent comparison test using a colour meter (Konica Minolta) where, “0 = Blackest - 100 = Whitest”
ü 4 ns -> 30 with marking speed 200 mm/s ü 1 ns -> 30 with marking speed 300 mm/s ü 0.7 ns -> 30 with marking speed 2,000 mm/s
ü Nano-wire Patterning,
ü Marking on PA plastic,
ü ITO removal
CONFIDENTIAL
ü Tunable pulse width 500 ps high power module (with 1 ns resolution)
ü Peak Power in excess of 30kW
ü Pulse Energy up to 100 uJ
ü Excellent Thermal stability performance (< 5% variation across operating range of 10 – 55 °C)
ü High Repetition Rates of up to 1 MHz
ü M2 = 1.6
ü Cost Efficient
ü Many Potential Target Applications
ILUMA’S ps – ns tunable Pulse Fiber Laser: IN SUMMARY
CONFIDENTIAL
Introduction to
iLuma Photonics
CONFIDENTIAL 20
公司简介 • 投资4000万中外合资企业， 位于深圳南山区科技园，是深圳市政府重点支持的高新技术企业。
• 致力于高端光纤激光器的研发、生产与销售，满足市场对先进激光源的需求。
• 研发团队由海外高层次人才团队领衔，超过40%的研发人员拥有海外博士学位和工作背景。
• 拥有自主知识产权和多年光纤激光领域研发经验。在飞秒、皮秒以及非线性光学等领域拥有深厚的理论知识和和相关的工艺实验背景积累。
• 二个光学实验室，一个电子测试实验室，一个先进应用开发实验室，以及两条无尘洁净生产线。
• 同深圳大学进行“反斯托克斯光子显微成像技术”技术合作。
• 2013年5月20W短脉冲激光器通过全面测试，投放市场。
ILUMA PHOTONICS
CONFIDENTIAL
现有研发设施
二个光学试验室
一个电子和测试实验室
一个先进激光应用实验室
二条洁净生产线
21
ILUMA PHOTONICS
CONFIDENTIAL 22
样机测试 ILUMA PHOTONICS – APPLICATIONS LAB
CONFIDENTIAL
SUMMARY OF ILUMA’S CURRENT AVAILABLE PRODUCTS
Product Name 20W LOW MODE 20W SHORT PULSE 20W ps – ns TUNABLE
Product Code IFL-20P-LM-N-1 IFL-20P-LM-S-1 IFL-20P-LM-P-1
Average Power 20W 20W 20W*
Centre Wavelength 1060 ± 5 nm 1060 ± 5 nm 1060 ± 5 nm
Pulse Widths 4ns-350ns 1.5ns-10ns 500ps-10ns
Max. Peak Power 25KW 20KW Up to 30KW
Repetition Freq. 20 - 1000kHz 150 - 1000kHz 150 - 1000kHz
Oper. Temp Var. 5% 5% 5%
Max. Pulse Energy 1 mJ 100uJ 100uJ
Output Beam Size 1 – 10mm 1 – 10mm 1 – 10mm
M² ≤2 ≤ 2 ≤ 2
ü Low Mode ü Short Pulse ü ps – ns Tunable
23
* > 20W not available at 500 ps yet
CONFIDENTIAL
SUMMARY OF ILUMA’S PRODUCT PORTFOLIO (TO BE RELEASED)
Product Name 20W SINGLE MODE 20W SMART 30W HIGH MODE
Product Code IFL-20P-SM-N-1 IFL-20P-ST-N-1 IFL-30P-HM-N-1
Average Power 20W 20W 30W
Centre Wavelength 1060 ± 5 nm 1060 ± 5 nm 1060 ± 5 nm
Pulse Widths 4ns-200ns AUTO 10ns-350ns
Max. Peak Power 12KW 25KW 25KW
Repetition Freq. 25 - 1000kHz 20 - 150kHz 25 - 1000kHz
Oper. Temp Var. 5% 5% 5%
Max. Pulse Energy 0.8mJ 1mJ 1.2mJ
Output Beam Size 1 – 10mm 1 – 10mm 1 – 10mm
M² ≤1.3 ≤ 2 ≤ 4
ü Single Mode ü 20W SMART ü 30W High-Mode
CONFIDENTIAL
CONCLUSION ü With new industrial applications and improvements to existing applications being
required using fiber lasers
ü We need a new fiber laser technologies that are cost efficient, reliable and flexible.
ü iLuma believes that our ps – ns tunable pulse fiber laser module will contribute to this growth and enhancement.
ü iLuma will contribute to the rapidly growing fiber laser industry as it has
ü strong technical expertise in developing and manufacturing a wide range of innovative fiber laser products
ü strong application experience that could significantly value add to our customers’ business,
ü we are also very focus in being application orientated in our approach to product development
