Modified Sagnac/Mach-Zehnder interferometer for distributed disturbance sensing

Anatoli A. Chtcherbakov; Pieter L. Swart; Stephanus J. Spammer; Beatrys M. Lacquet

doi:10.1117/12.323432

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23 September 1998 Modified Sagnac/Mach-Zehnder interferometer for distributed disturbance sensing

Anatoli A. Chtcherbakov, Pieter L. Swart, Stephanus J. Spammer, Beatrys M. Lacquet

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Proceedings Volume 3489, Fourth Pacific Northwest Fiber Optic Sensor Workshop; (1998) https://doi.org/10.1117/12.323432
Event: Fourth Pacific Northwest Fiber Optic Sensor Workshop, 1998, Troutdale, OR, United States

Abstract

We propose an alternative configuration for an interferometric distributed fiber optic sensor. The sensor uses a combination of Mach-Zehnder and Sagnac interferometers that share the same fiber. The output of the Sagnac interferometer is proportional to the product of the position where the disturbance was applied and the magnitude of the disturbance. The output of the Mach-Zehnder interferometer is a function of the disturbance magnitude only. The position and magnitude of a disturbance applied to the sensing fiber can thus be obtained from these two signals. Results obtained with a 200 m distributed fiber sensor are discussed.

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Anatoli A. Chtcherbakov, Pieter L. Swart, Stephanus J. Spammer, and Beatrys M. Lacquet "Modified Sagnac/Mach-Zehnder interferometer for distributed disturbance sensing", Proc. SPIE 3489, Fourth Pacific Northwest Fiber Optic Sensor Workshop, (23 September 1998); https://doi.org/10.1117/12.323432

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