Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 22, Issue 3, Pages 185-187Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2009.2037238
Keywords
Coherent transmission; frequency-stabilized laser; optical phase-locked loop (PLL); quadrature amplitude modulation (QAM); spectral efficiency (SE)
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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.
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