Fiber-optic differential displacement measurement based on three cascaded interferometers

Seiichiro Kinugasa; Jun-ichi Yoshinaga

doi:10.1117/12.623274

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23 May 2005 Fiber-optic differential displacement measurement based on three cascaded interferometers

Seiichiro Kinugasa, Jun-ichi Yoshinaga

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Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623274
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

A new type of white-light-interferometric (WLI) fiber optic sensor is proposed. Three cascaded interferometers enable differential measurement. Two interferometers among the three are used for sensing. The other is for processing, which converts the imbalance of optical path difference (OPD) between the two sensing interferometers into differential displacement. This unique three-cascaded WLI sensor system is described in detail with some experimental results.

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Seiichiro Kinugasa and Jun-ichi Yoshinaga "Fiber-optic differential displacement measurement based on three cascaded interferometers", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623274

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