09.07.2015 Views

Optical Communications Technology and Modulation Formats 16 ...

Optical Communications Technology and Modulation Formats 16 ...

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40Gbps <strong>Modulation</strong> Scheme ComparisonStratalightPSBT NRZ-DPSK RZ-DPSK DQPSK PM-QPSKRelative cost estimate 0% +10% +30% +50% +70%Spectral efficiency 0.8bits/Hz 0.8bits/Hz 0.8bits/Hz 0.8bits/Hz 2bits/HzIntrinsic CD tolerance 320ps/nm 100ps/nm 60ps/nm 200ps/nm (1)1 st order PMD tolerance 2.1ps 2.5ps 2.8ps 5ps 30ps2 nd order PMD tolerance HIGH MEDIUM LOW HIGH HIGHOSNR sensitivity 17.5dB 13.9dB 13.9dB 15dB 11dBReach 800km 1,600km 1,600km 1,000km 2,000kmPenalty per ROADM negligible 0.2dB 0.2dB negligible negligibleNon-linear X-talk from 10G low low low high high(1)CD tolerance depends on # taps in FIR filterStrataLight proprietary <strong>and</strong> confidential information 33

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