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 mandatoryTunable lasers

using protocols or embedded-communication channelsusing pilot-tones

Colorless seeded WDM-PONSelf-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

ERMES

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), 6774 (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 lossesModulation 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 lossesModulation to directly impress dataSaturation 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 roundtripsThe spectrum takes one order of magnitude more roundtrips to steady stateThe spectrum presents a red shift

red shift

ERMES

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

ERMES

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

ERMES

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

ERMES

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

Embedded Resonant and ModulablE Self-tuninglaser cavity for next generation access network transmitter

ERMES

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

ERMES

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

ERMES

WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?

PI curves

ERMES

WS5 - Is NG-PON2 an ultimate access solution? Is there anything coming afterwards?

Gaussian AWG various channels