Homodyne detection offers the ultimate in receiver sensitivity and bandwidth efficiency. The key element in realizing a practical homodyne receiver is the optical phase lock loop (OPLL). Previous work has been reported using a gas laser in a phase lock loop homodyne receiver1 and more recently the application of an external cavity semiconductor laser in a homodyne phase lock loop.2 This paper, for the first time, reports the performance of a semiconductor optical phase lock loop and discusses the optimization of the system in terms of its dynamic response, acoustic and Ray-leigh backscatter sensitivity.

© 1986 Optical Society of America

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