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Performance of coherent optical receivers

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2 Author(s)
Barry, J.R. ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; Lee, E.A.

Coherent optical communications, an area of research that shows great promise for future high-bandwidth and long-haul applications, is reviewed. Coherent optical receivers, which add light to the received signal as part of the detection process, have numerous advantages over direct-detection receivers, most notably increased sensitivity and increased selectivity, at the cost of increased complexity. The performance of coherent optical receivers under shot-noise-limited conditions is reviewed for a variety of modulation and demodulation formats. In addition, laser phase noise is discussed, and its effect on receiver performance is analyzed

Published in:

Proceedings of the IEEE  (Volume:78 ,  Issue: 8 )