Sensitive Fiber-Optic Interferornetric Sensor Arrays

J L Brooks; B Y Kim; M Tur; H J Shaw

doi:10.1117/12.937513

28 April 1987 Sensitive Fiber-Optic Interferornetric Sensor Arrays

J L Brooks, B Y Kim, M Tur, H J Shaw

Proceedings Volume 0718, Fiber Optic and Laser Sensors IV; (1987) https://doi.org/10.1117/12.937513
Event: Cambridge Symposium-Fiber/LASE '86, 1986, Cambridge, MA, United States

Abstract

This paper describes a passive interferometric sensor array which uses high duty-cycle time-domain addressing to separate and identify the signals from each sensor. Using the array configuration described here, the source phase-induced intensity noise which limits some other multiplexing methods is substantially eliminated, resulting in high sensitivity. The array configuration facilitates the use of synthetic heterodyne demodulation techniques to prevent environmentally induced signal-fading. An experimental all-fiber implementation of a dual-sensor array was used to investigate practical sensitivity and cross talk levels. A measured sensitivity of approximately 10 μrad/√Hzhas been achieved over a range of signal frequencies.

Citation Download Citation

J L Brooks, B Y Kim, M Tur, and H J Shaw "Sensitive Fiber-Optic Interferornetric Sensor Arrays", Proc. SPIE 0718, Fiber Optic and Laser Sensors IV, (28 April 1987); https://doi.org/10.1117/12.937513

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