Improved polarization-mode-dispersion tolerance in duobinary transmission using 2.5 Gb/s MZ modulator in 10.7 Gb/s metro networks

摘要

A reduced Mach Zehnder modulator was used for duobinary modulation and optical pulse shaping in a 64-channel (10.7 Gb/s) dense wavelength division multiplexing over 200 SSMF Metro networks. The electrical filter required in conventional duobinary systems is no longer needed. The proposed method cuts down in the complexity and cost of the duobinary transceivers. In addition, the first order PMD tolerance within 2 dB penalty in OSNR was quantified and found to be 21 ps when FEC is used.