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256-QAM (64 Gb/s) Coherent Optical Transmission Over 160 km With an Optical Bandwidth of 5.4 GHz

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5 Author(s)
Nakazawa, M. ; Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan ; Okamoto, S. ; Omiya, T. ; Kasai, K.
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We report a polarization-multiplexed (Pol-Mux) 4-Gsymbol/s 256 quadrature amplitude modulation (QAM) coherent optical transmission over 160 km. A 64-Gb/s data signal was successfully transmitted with an optical bandwidth of 5.4 GHz. We also describe a Pol-Mux, 10-Gsymbol/s, 128- and 64-QAM (140 and 120 Gb/s) transmission over 150 km.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 3 )