40Gb/s alien-wavelength experiment over 000km TR fiber between Amsterdam and Copenhagen Roeland Nuijts, URFnet, roeland.nuijts@surfnet.nl Lars Lange Bjørn, NORDUnet, longbear@nordu.net Terena Networking Conference 200, Vilnius, Lithuania
Outline Alien wavelength concept Alien wavelength advantages and disadvantages Amsterdam-Hamburg-Copenhagen DDM transmission systems Alien wavelength channel allocation plan imple method to measure ONR in presence of ROADMs Results of alien wavelength experiments Amsterdam-Copenhagen Conclusions & acknowledgements
Alien wavelength concept (a) conventional closed DDM system (b) multi-domain DDM systems (c) multi-domain DDM systems with alien wavelength
Alien wavelength advantages direct connection of customer equipment cost savings avoid OEO regeneration power savings faster time to service time savings support of different modulation formats extend network lifetime
Alien wavelength challenges complex end-to-end optical path engineering in terms of linear (i.e. ONR, dispersion) and non-linear (FM, PM, XPM, Raman) transmission effects for different modulation formats complicated system integration/functional testing end-to-end monitoring, fault isolation and resolution end-to-end service activation
Transmission system configuration JOINT URFnet/NORDUnet 40Gb/s PM-QPK alien wavelength DEMONTRATION 40G 0G Copenhagen End-to-end FoM = 400 (a couple of db margin over BOL ONR limit - set against nonlinearities and potentially adverse effect from filter concatenation [4]) 46km TR Alcatel-Lucent (with dispersion compensation) 640km TR Nortel (without dispersion compensation) Hamburg 40G 40G 0G Amsterdam 40G Hamburg 40G alien wave 900GHz 350GHz 0G 5x0Gb/s 0G 5x0Gb/s @ 50GHz
avelength plan 350GHz guard band 5x0Gb/s wavelengths 94,00 93,95 93,90 93,85 93,80 93,75 93,70 93,65 93,60 93,55 93,50 93,45 93,40 93,35 93,30 93,25 93,20 93,5 93,0 93,05 93,00 92,95 92,90 92,85 92,80 92,75 92,70 92,65 40Gb/s wavelength 900GHz 40Gb/s alien wavelength 5x0Gb/s wavelengths
0Gb/s Electronic Dispersion Pre-compensation h r (t) DAC LPF I Data C source M-Z M-Z 90 o h i (t) DAC LPF Q lide courtesy of Kim Roberts, CIENA
EDC (Electrical Dispersion Compensation) Total 5000km standard transmission fiber H(f) h r(t) DAC LPF I Data h i(t) C source DAC LPF EDC off EDC on Optical Optical M-Z M-Z 9 0o Q Power Arb. Units 2.5 2.5 0.5 4400 4600 4800 5000 5200 5400 Power Arb. Units time 2.5 2.5 z=0km D=-87500ps/nm OA OA OA Optical ps Optical Power Arb. Units 2.5 ps 0.5 4400 4600 4800 5000 5200 5400 Power Arb. Units time z=5000km 2.5 2.5 ps ps 0.5 0.5 4400 4600 4800 5000 5200 5400 time 4400 4600 4800 5000 5200 5400 time z=0km z=5000km 2.5 D=+87500ps/nm High PAPR (Peak-to-Average Power Ratio) Low power per channel Low ONR trong FEC
Eye diagram before and after transmission with EDC Transmitted signal (z=0km) ignal after 600 km of NDF with no optical compensation lide courtesy of Kim Roberts, CIENA
ONR measurement in optically amplified system Optical spectrum at output of transmit OA in Amsterdam (RB=0.5nm) Power (dbm) -0-5 -20-25 -30-35 -40-45 -50-55 ONR -60 526 530 534 538 542 546 550 554 558 562 566 avelength (nm)
ONR measurements in systems with ROADMs x N x N x N 2 Difficult to determine ONR level due to data modulation
ONR measurements in systems with ROADMs cont d x N x N x N Use tunable laser no modulation but amplifier link setting remains same -25-25 -25-30 0.nm resolution Advantest -30 0.05nm resolution Advantest -30 0.02nm resolution Advantest -35-35 -35-40 -40 power (dbm) -40 power (dbm -45 power (dbm) -45-45 -50-50 -55-50 -55-60 -55 558.5 558.6 558.7 558.8 558.9 559 559. 559.2 559.3 559.4 559.5 wavelength (nm) -60 558.5 558.6 558.7 558.8 558.9 559 559. 559.2 559.3 559.4 559.5 wavelength (nm) -65 558.5 558.6 558.7 558.8 558.9 559 559. 559.2 559.3 559.4 559.5 wavelength (nm) 0.nm resolution 0.05nm resolution 0.02nm resolution 3
Transmission system configuration JOINT URFnet/NORDUnet 40Gb/s PM-QPK alien wavelength DEMONTRATION 40G 0G Copenhagen End-to-end FoM = 400 (a couple of db margin over BOL ONR limit - set against nonlinearities and potentially adverse effect from filter concatenation [4]) 46km TR Alcatel-Lucent (with dispersion compensation) 640km TR Nortel (without dispersion compensation) Hamburg 40G 40G 0G Amsterdam 40G Hamburg 40G alien wave 900GHz 350GHz 0G 5x0Gb/s 0G 5x0Gb/s @ 50GHz Error-free transmission for 30 days BER < 9.6 0-8
URFnet network GUI - Optical Modeler 5
Conclusions - e have investigated experimentally the all-optical transmission of a 40Gb/s PM-QPK alien wavelength via a concatenated native and third party DDM system that both were carrying live 0Gb/s wavelengths - The end-to-end transmission system consisted of 056km of TR (Trueave Reduced lope) transmission fiber - e demonstrated error-free transmission for 30 days (i.e. BER below 0-7 ) 6
Acknowledgements The research leading to these results has received part of its funding from the European Community¹s eventh Framework Programme (FP7/2007-203) under grant agreement nº 238875 (GÉANT) 7
Thanks for your attention! Questions? roeland.nuijts@surfnet.nl +3-30-2305 305 8