31 October 1985 Coherent Optical Receivers: Performance Analysis and Laser Linewidth Requirements
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Abstract
The performance of coherent optical receivers is affected by the phase noise of the laser transmitter and the laser local oscillator, and by the shot noise due to the detectors employed in the receiver. In this paper, the performance of coherent optical receivers is analyzed while taking into account both aforementioned noise sources. Further, the maximum permissible laser linewidth tv for coherent optical communications systems is evaluated. Both heterodyne and homodyne systems are considered. It is shown that the value of ▵ν depends on the system bit-rate Rb and on the modulation/demodulation technique employed: for heterodyne receivers with noncoherent post detection processing (used in conjunction with ASK, FSK and DPSK modulation formats), Av<(0.007-0.09)Rb; for heterodyne receivers with coherent post detection processing (used in conjunction with the PSK modulation format), ▵ν≤7.4.1010-4rb and for homodyne receivers, ▵ν≤8.2.10--Rb.
© (1985) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Leonid G. Kazovsky, Leonid G. Kazovsky, } "Coherent Optical Receivers: Performance Analysis and Laser Linewidth Requirements", Proc. SPIE 0568, Coherent Technology in Fiber Optic Systems I, (31 October 1985); doi: 10.1117/12.949850; https://doi.org/10.1117/12.949850
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