Polarization and frequency division multiplexed 1Gsymbol/s, 64 QAM coherent optical transmission with 8.6bit/s/Hz spectral efficiency over 160km

Hiroki Goto; Masato Yoshida; Tatsunori Omiya; Keisuke Kasai; Masataka Nakazawa

doi:10.1587/elex.5.776

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Polarization and frequency division multiplexed 1Gsymbol/s, 64 QAM coherent optical transmission with 8.6bit/s/Hz spectral efficiency over 160km

Hiroki Goto, Masato Yoshida, Tatsunori Omiya, Keisuke Kasai, Masataka Nakazawa

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Keywords: coherent transmission, QAM, frequency division multiplexing, polarization multiplexing, frequency-stabilized laser

JOURNAL FREE ACCESS

2008 Volume 5 Issue 18 Pages 776-781

DOI https://doi.org/10.1587/elex.5.776

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Abstract

Quadrature amplitude modulation (QAM) is an excellent modulation format for realizing optical communication systems with a high spectral efficiency aiming at 10bit/s/Hz. We describe a three-channel frequency division multiplexed (FDM) and polarization-multiplexed 1 Gsymbol/s, 64 QAM coherent transmission over a 160km SMF with a 1.4GHz spacing. The total capacity for each channel reaches 36Gbit/s in an optical bandwidth of 4.2GHz, resulting in a spectral efficiency of 8.6bit/s/Hz.

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