The use of a Nyquist filter for reducing an optical signal bandwidth in a coherent QAM optical transmission

Keisuke Kasai; Jumpei Hongo; Hiroki Goto; Masato Yoshida; Masataka Nakazawa

doi:10.1587/elex.5.6

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The use of a Nyquist filter for reducing an optical signal bandwidth in a coherent QAM optical transmission

Keisuke Kasai, Jumpei Hongo, Hiroki Goto, Masato Yoshida, Masataka Nakazawa

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Keywords: coherent transmission, QAM, Nyquist filter, frequency-stabilized laser

JOURNAL FREE ACCESS

2008 Volume 5 Issue 1 Pages 6-10

DOI https://doi.org/10.1587/elex.5.6

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Abstract

By introducing a Nyquist filter, we have successfully reduced a data signal bandwidth without intersymbol interference and transmitted a polarization-multiplexed 1Gsymbol/s, 64QAM(12Gbit/s) coherent signal over 150km in an optical bandwidth of 1.5GHz.

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