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A Proposed Receiver Structure for Optical Communication Systems that Employ Heterodyne Detection and a Semiconductor Laser as a Local Oscillator

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2 Author(s)
Georghiades, C. ; Washington Univ., St. Louis, MO, USA ; Snyder, Donald L.

Coherent heterodyne detection in optical communication is degraded by phase instabilities present when a semiconductor laser is used as a local oscillator. Postdetection processing that accounts for these instabilities is suggested, based on a diffusion-process model for oscillator instabilities and a maximum-likelihood sequence-estimator of information symbols modulating the received light.

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Communications, IEEE Transactions on  (Volume:33 ,  Issue: 4 )