Coherent Demodulation of Optical Quadrature Duobinary Signal with Spectral Efficiency of 4 bit/s/Hz per Polarization

Conference: ECOC 2007 - 33rd European Conference and Exhibition of Optical Communication
09/16/2007 - 09/20/2007 at Berlin, Germany

Proceedings: ECOC 2007

Pages: 2Language: englishTyp: PDF

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KIKUCHI, Kazuro; ISHIKAWA, Yuta; KATOH, Kazuhiro (Department of Frontier Informatics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan)

We demonstrate demodulation of a 20-Gbit/s optical quadrature duobinary signal using the digital coherent receiver. The spectral efficiency reaches 4 bit/s/Hz/polarization owing to the narrowband duobinarycoded signal and quadrature modulation.