self-seeded wdm-pon
TRANSCRIPT
ERMES
Self-seeded WDM-PONP. Parolari, L. Marazzi, M. Brunero, M. Martinelli
DEIB, Politecnico di Milano, Milano, Italy
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
The wavelength resource
The wavelength resource is taken for granted in NG-PON
Wavelength control and management are mandatory�Tunable lasers
�using protocols or embedded-communication channels�using pilot-tones
�Colorless seeded WDM-PON�Self-seeded WDM-PON
ONT
ONT
ONT
….
OLT
Tunable
4x10G DS
4x2.5G US
TWDM-PON
ONU
ONU
ONU
….
WDM-PtP
OLT
OLT
OLT
….
AW
G
AW
G
λ
λ’
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WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Self-seeded WDM-PON
Self-seeding provides:
�colourless transmitters
�RSOAs [E. Wong et al., J. Lightwave Technol. 25(1), 67–74 (2007)]
�FPs [M. Presi et al, IEEE Photon. Technol. Lett., 241(17),1523-1526 (2012)]
�automatic and passive wavelength assignment
�determined by the plugged WDM multiplexer channel
�robust control
�determined by the physical mechanism associated
with cavity build-up
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Self-seeding principle of operation
The active element has a triple role:�Gain to make up for cavity losses
Active element
RSOA
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Self-seeding principle of operation
Active element
RSOA
The active element has a triple role:�Gain to make up for cavity losses�Modulation to directly impress data
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Self-seeding principle of operation
The active element has a triple role:�Gain to make up for cavity losses�Modulation to directly impress data�Saturation to cancel recirculating modulation
RSOA
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Self-seeding principle of operation
RSOA
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Self-seeding principle of operation
RSOA
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Cavity build up
Output optical power evolution during first roundtrips
Output optical spectrum evolution during build up
roundtrip time
�Output optical power reaches steady state in less than 10 roundtrips�The spectrum takes one order of magnitude more roundtrips to steady state�The spectrum presents a red shift
red shift
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WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Self-seeded source quality
Multimode source: thousands of modes for the short cavities to hundreds of thousands for the km-long onesRIN ≈20 dB better than spectrally sliced broadband optical sources
≈15 dB worse DFB
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WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Recent results C-bandOB [dB] @ BER 10-3
2.5
Gb
/s
Drop fiber BtB 25 km 50 km 75 km
10 m 34 33.3 32.6 27
1 km 32.4 32 29.5
5 km 30 28
10 G
b/s
Drop fiber
52 km NZDF-
32 km NZDF-
52 km NZDF-+8 km SSMF
BtB 20 km DSF
8 km NZDF+
25 km NZDF+
420 m -300 -185 -160 0 10 23 72
Dispersion load [ps/nm] @ BER 3 10-3
Best result @ -29 dBm received power
Q. Deniel et al. "Self-seeded RSOA based WDM-PON transmission capacities” OFC 2013, Anheim CA
L. Marazzi et al. “Up to 10.7-Gb/s High-PDG RSOA-based Colourless Transmitter for WDM Networks” IEEE Photon. Technol. Lett, 25, 637, 2013
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WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Recent results O-band
� No chromatic dispersion penalty
�Optical power budget limited
2.5
Gb
/s
Drop fiber Feeder fiber BER
10 m 90 km <1�10-5
10 km 50 km <1 �10-4
26 km 40 km <3 �10-410
Gb
/s
Drop fiber Feeder fiber BER
10 m 52 km 3 �10-4
420 m 40 km 7 �10-4
1 km 40 km 3 �10-3
G. Simon et al. “70km external cavity DWDM sources based on O-band self seeded RSOAs for transmissions at 2.5Gbit/s” OFC 2014, San Francisco CA
P. Parolari et al, “10-Gb/s Operation of a Colorless Self-Seeded Transmitter Over More Than 70 km of SSMF”, IEEE Photon. Technol. Lett, 26. 599, 2014
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WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Conclusions
RSOA based self-seeded transmitters allow easy wavelength
control and management
�Colourless: avoiding external seeding sources and associated
Rayleigh scattering
�Self-tuning: robust passive and automatic wavelength
assignment
�Multimode optical carrier with better quality than spectrally sliced
broadband optical sources
�Demostrated long cavity performance up to 10 Gb/s over more
than 40-km in O and C-band
FP7-ICT-2011-7
EmbeddedResonant and ModulablE Self-tuninglaser cavity for next generation access network transmitter
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visit www.ermes-project.eu
ERMES talk @ ECOC 2014
Tu.1.7.4 Build-up Analysis of an RSOA-based Self-seeded Transmitter L. Marazzi et al.
Tu.3.2.5 125km Long Cavity based on Self Seeded RSOAs Colorless Sources for 2.5Gbit/s DWDM Networks F. Saliou et al.
P.7.20 Experimental evaluation of burst mode operation of a RSOA-based self-seeded transmitter M. Brunero et al.
P.7.14 Infrastructure impact on transmission performance of self-seeded DWDM colorless sources at 2.5Gbps G. Simon et al.
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
eye diagrams
ER=4.3 dB
10 Gb/s2.5 Gb/s
ER=5 dB
ERMES
WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
CD
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WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Polarization retracing topology
RSOA with very high modulation performance may show HPDGNecessary a polarization retracing topology
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WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
PI curves
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WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?
Gaussian AWG various channels