New modulation scheme for optical fiber point temperature sensor

Faramarz Farahi

doi:10.1117/12.46989

1 September 1991 New modulation scheme for optical fiber point temperature sensor

Faramarz Farahi

Proceedings Volume 1504, Fiber-Optic Metrology and Standards; (1991) https://doi.org/10.1117/12.46989
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

Abstract

A fiberoptic interferometric sensor illuminated by a laser source requires a minimum path imbalance in order to implement one of the standard signal-processing techniques. In this work, a modulation technique is described in conjunction with a fiber interferometric sensor with a typical size of 2-3 mm. This is a passive technique which makes use of modal properties of highly birefringent fiber to generate quadrature-output components. The quadrature outputs are then used to generate a fixed-frequency carrier where the phase information is affected by the temperature change.

Citation Download Citation

Faramarz Farahi "New modulation scheme for optical fiber point temperature sensor", Proc. SPIE 1504, Fiber-Optic Metrology and Standards, (1 September 1991); https://doi.org/10.1117/12.46989

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