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Design and OAM&P aspects of a DWDM system equipped with a 40Gb/s PM-QPSK alien wavelength and adjacent 10Gb/s channels

Nuijts, Roeland; Bjørn, Lars Lange; Petersen, Martin Nordal; Manolova, Anna Vasileva

Published in: Proceedings of the TERENA Networking Conference

Publication date: 2011

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Citation (APA): Nuijts, R., Bjørn, L. L., Petersen, M. N., & Manolova, A. V. (2011). Design and OAM&P aspects of a DWDM system equipped with a 40Gb/s PM-QPSK alien wavelength and adjacent 10Gb/s channels. In Proceedings of the TERENA Networking Conference https://tnc2011.terena.org/

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Design and OAM&P aspects of a DWDM system equipped with a 40Gb/s PM -QPSK alien wavelength and adjacent 10Gb/s channels

Lars Lange Bjørn, NORDUnet Roeland Nuijts, SURFnet Martin Nordal Petersen, DTU Fotonik Anna Vasileva Manolova, DTU Fotonik

Terena Networking Conference 2011 16 - 19 May, , Czech Republic

connect • communicate • collaborate 1 Outline

History Design VPI off-line simulations Experimental results OAM&P Costs considerations Conclusion

connect • communicate • collaborate History

April 2009: SURFnet fosters the idea of deploying an alien wavelength. SURFnet purchases and install additional needed hardware Ready to go – September 2009

November 2009: Hero experiment presented at SC, Portland Oregon. Ability of both network was tested Shortcomings identified Operated in un-optimized conditions; BER < 3,0 10-16

June 2010: TNC 2010, , Lithuania. Simulations in Ciena Optical Modeller Optimized condition BER < 10-17

May 2011: TNC 2011, Prague, Czech Republic. Whats new?

connect • communicate • collaborate System configuration May 2011

• 10G ne ig hbours • Guardband variation 50 – 150 GHz • Full control of spectrum in NORDUnet • Off-line VPI simulations

connect • communicate • collaborate VPI simulations

GOALS CHALLENGES

• Verification of • Obtaining all needed experimental results information about • Facilitate design and components contlftrol of current set up • Limiti ng the VPI mo de l to • Investigate option for include the most future Multi- important aspects of the domain/vendor simulation design tool

connect • communicate • collaborate VPI configuration S ux t

Amsterdam – Hamburg – oring data MM Mux EDFA OSNR Filter (demux) Hamburg DSP x 40G Pol 1 Visualize EDFA 10G NRZ

NRZ Mux r GG s 3 x 10 De-mux 10G NRZ

connect • communicate • collaborate VPI: S ux t

Amsterdam – Hamburg – oring data MM Mux EDFA Copenhagen OSNR Filter (demux) Hamburg DSP x 40G Pol 1 Visualize EDFA 10G NRZ

NRZ Mux r GG s 3 x 10 De-mux 10G NRZ

• 40G PM-QPSK injection • Additional 10G’s •MUX • Pre-AMP

connect • communicate • collaborate VPI: Amsterdam - Hamburg S ux t

Amsterdam – Hamburg – oring data MM Mux EDFA Copenhagen OSNR Filter (demux) Hamburg DSP x 40G Pol 1 Visualize EDFA 10G NRZ

NRZ Mux r GG s 3 x 10 De-mux 10G NRZ

• 640km TWRS • 9 amps • No CD compensation

connect • communicate • collaborate VPI: Hamburg S ux t

Amsterdam – Hamburg – oring data MM Mux EDFA Copenhagen OSNR Filter (demux) Hamburg DSP x 40G Pol 1 Visualize EDFA 10G NRZ

NRZ Mux r GG s 3 x 10 De-mux 10G NRZ

• DE-MUX • Pre-AMP ALU • 10G injection •MUX

connect • communicate • collaborate VPI: Hamburg - Copenhagen S ux t

Amsterdam – Hamburg – oring data MM Mux EDFA Copenhagen OSNR Filter (demux) Hamburg DSP x 40G Pol 1 Visualize EDFA 10G NRZ

NRZ Mux r GG s 3 x 10 De-mux 10G NRZ

• 416 km TWRS • 5 amps (dual w. access) • CD compensation

connect • communicate • collaborate VPI: Copenhagen S ux t

Amsterdam – Hamburg – oring data MM Mux EDFA Copenhagen OSNR Filter (demux) Hamburg DSP x 40G Pol 1 Visualize EDFA 10G NRZ

NRZ Mux r GG s 3 x 10 De-mux 10G NRZ

• OSNR adjustment and control • WSS represented by filter/demux •PM-QPSK receiver with DSP

connect • communicate • collaborate VPI: Assumptions and Method

Assumptions Method • Noise Figure (AMP) = 5 • Monte Carlo approach: • OSNR at REC = 20 50.000 bits per data point • PMD: 0.05x10-12 s/½/m½ • Simulation time usage: • Nonlinearity index With nonlinearities ~ parameter (transmission 3-4 hours per data point. fiber): 2.4x10-20 m2/W Without nonlinearities ~ • Nonlinearity index 15 minutes. pp(arameter (DCM fiber): 3.0x10-20 m2/W

connect • communicate • collaborate VPI Results: 10G variation w . constant 40G

• XPM • Lack of SPM?

connect • communicate • collaborate VPI Results: 10G off / 40G high power

•Strong SPM

connect • communicate • collaborate VPI results: 40G variation w . constant 10G

• XPM • SPM

connect • communicate • collaborate Experimental results: 50GHz spacing Bm) dd power ( GG 10

connect • communicate • collaborate Experimental results: 100GHz spacing r (dBm) ee 0G pow 11

connect • communicate • collaborate Experimental results: 150GHz spacing r (dBm) 0G powe 1

connect • communicate • collaborate Experimental results: 50HGz to 150GHz @ 10G = -20, 7 dBm

The pre-FEC BER is below 10-3 unless spacing is above 100GHz

The Alcatel-Lucent design ggpuide specifies 10G = -17,2 in order to maintain guarantied performance according to traffic matrix!

connect • communicate • collaborate OAM&P - standardization

ITU Standardization • G.698.1: Multichannel DWDM applications with single-channel optical interfaces

• G.698.2: Amplified multichannel dense wavelength division multiplexing applications with single channel optical interfaces

Scope & Info • To provide optical interface specifications towards the realization of transversely compatible dense wavelength division multiplexing (DWDM) systems primarily intended for metro applications • Applicable for 2,5G and 10G @ 100GHz / 50GHz spacing

connect • communicate • collaborate OAM&P - issues

Consequence

NREN ISSUES NREN TARGETS • No transverse • Full optical transparency compatibility for newer LH •Bitrate modulation schemes. • Modulation format • No standardization targets • Spacing LH/ULH applications • Full optical control • No standardization targets • Power OTS/OMS interworking • Spectrum • Admission

connect • communicate • collaborate OAM&P - setup

OADC D add AMP WSS w . ”OSA”

A OADC 1:2 OADC 2x4:1 B WSS 1:8 E AMP WSS w . ”OSA” C drop

40Gb PM-QPSK Bitr Mod GHz. Powr Spec Addm u A. Add to System ✔✔ ✔✗✗ ✗ B. Add to spectrum ✔✔ ✗✗ ✗✔ C. Control spectrum ✔✔ ✗ ✔✔ ✔ D. Monitor spectrum ✔ ✔ ✗ ✗ ✗ ✗ E. Drop from system ✔✔ ✗ ✔ connect✗✗ • communicate • collaborate OAM&P wrap up

SPECTRUM MANAGEMENT ALARMS Security ✔ Element Manager Native system ✔ CtlControl ✔ ✔ Alien sys tem ✔ Network Manager ✗

REMAINING CHALLENGE • Communication between native and alien management/alarm systems • Common optical design tool allowing joint network design between different platforms with predictable performance.

connect • communicate • collaborate Cost considerations: 200G Amsterdam - Copenhagen

•6 min/XFP • Guard band neglected • 12 min/MUX • AW and native signals can co- • 30 min/linecard exists ()(Joint design rules) • 15 min/wave config • Alarm and Management • 20/30 hours travel AW/REG integration is possible

connect • communicate • collaborate Conclusion

• VPI simulation platform for alien wavelength evaluation conforms qualitatively with experimental results

• 40G PM-QPSK together with 10G NRZ shows large BER variations for varying power and guard band size

• OAM&P is adequate for this mix of products, few steps are needed for “normal operation”

• Costs is for this mix of products in favour of the AW approach

connect • communicate • collaborate Acknowledgements

We also would like to thank SURFnet and the Gigaport3 project for their support to acquire the 40Gb/s equipment and integration work from Telindus and simulation support from CIENA.

We are grateful to NORDUnet for providing us with bandwidth and additional transponders on their DWDM link for this experiment.

The research leading to these results has received part of its funding from the European Community’s Seventh Framework Programme(FP7/2007- 2013) under grant agreement nº 238875 (GÉANT).

connect • communicate • collaborate Thank you

Lars Lange Bjørn, [email protected]

connect • communicate • collaborate