Multiplexed interferometric fiber sensor arrays

The advantages of networking fiber sensors using optical telemetry techniques to form all-optical arrays of sensor-elements are well recognized. Interest in this general area began in the early 1980s, and over the past six years at NRL we have attempted to experimentally and theoretically characterize various different array configurations for interferometric sensor arrays based on frequency-division, time-division and coherence multiplexing schemes. Recently a number of tests by the U.S. Navy have successfully demonstrated the operation of multiplexed sensors at sea. Work has also been conducted on other novel multiplexing schemes for non-linear phase transduction based sensors and intensity-modulation based schemes. This paper will review the progress made in this area in recent years, and discuss some aspects of current research interest.

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