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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, Prague, 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, Vilnius, 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 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
connect • communicate • collaborate VPI: Amsterdam 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