Fiber optic precision position sensor based on reciprocal interferometry

Fang Ruan; Yan Zhou; Yee Loy Lam; Jun Liu; S. H. Mei; ChinYi Liaw

doi:10.1117/12.326829

13 October 1998 Fiber optic precision position sensor based on reciprocal interferometry

Fang Ruan, Yan Zhou, Yee Loy Lam, Jun Liu, S. H. Mei, ChinYi Liaw

Proceedings Volume 3467, Far- and Near-Field Optics: Physics and Information Processing; (1998) https://doi.org/10.1117/12.326829
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

We report a fiber optical nanometer range position sensor based on reciprocal interferometry, a concept of import in interferometric fiber-optic gyroscopes. The configuration resembles a modified Michelson interferometer with only one of the two arms used. The principle of operation is the interference between the reflected light wave from the fiber end and that from a reflective object. As both the reference and the sensing light waves shares the expected interference behavior, which agrees well with its mathematical simulation. A position sensing resolution of about 20 nm, which is limited by the choice of available components, has been demonstrated. The systems immunity to the influence of temperature change has also been verified.

Citation Download Citation

Fang Ruan, Yan Zhou, Yee Loy Lam, Jun Liu, S. H. Mei, and ChinYi Liaw "Fiber optic precision position sensor based on reciprocal interferometry", Proc. SPIE 3467, Far- and Near-Field Optics: Physics and Information Processing, (13 October 1998); https://doi.org/10.1117/12.326829

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