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The statistical network assessment process (SNAP) to evaluate benefits of amplifiers and transponders' upgrades

Abstract:

Following the requirement of optical network operators to assess the merit of physical layer technologies on optical network performances, we perform a statistical comparison of two possible implementations of flexible rate transceivers to enable the elastic network paradigm. Using the recently proposed Statistical Network Assessment Process (SNAP) we compare the average bitrate per lightpath that can be sustained using either pure flexible PM-M-QAM or Time Division Hybrid Modulation Formats (TDHMFs) transponders. We show that the latter technology is able to outperform the former of 23% in a Pan-European network scenario. In addition, we consider the variation of the average bitrate per LP as a function of the equivalent noise figure of the amplifiers, supposing to use either hybrid Raman/Erbium doped amplification or fully Erbium doped amplification schemes. We show that on average, an improvement of 1 dB in noise figure allows an increase of 3% in average bitrate per LP for TDHMF and 4% for PM-M-QAM. Finally, we show also the dependency of the same capacity metric vs. ROADM insertion loss, showing an average 2% capacity increase for each 1 dB improvement in ROADM loss, for both PM-M-QAM and TDHMF.