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Opt Express. 2012 May 21;20(11):12508-14. doi: 10.1364/OE.20.012508.

1024 QAM (60 Gbit/s) single-carrier coherent optical transmission over 150 km.

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1
Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai-shi, Miyagiken 980-8577 Japan. koizumi@riec.tohoku.ac.jp

Abstract

We demonstrate a record QAM multiplicity of 1024 levels in a single-carrier coherent transmission. A frequency-domain equalization technique and a back-propagation method are adopted to compensate for distortions caused by hardware imperfections and fiber impairments, respectively. As a result, 60 Gbit/s polarization-multiplexed transmission over 150-km has been achieved at 3 Gsymbol/s within an optical bandwidth of only 4.05 GHz.

PMID:
22714238
[Indexed for MEDLINE]
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