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Proceedings Paper

Fiber optic precision position sensor based on reciprocal interferometry
Author(s): Fang Ruan; Yan Zhou; Yee Loy Lam; Jun Liu; S. H. Mei; ChinYi Liaw
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Paper 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.

Paper Details

Date Published: 13 October 1998
PDF: 8 pages
Proc. SPIE 3467, Far- and Near-Field Optics: Physics and Information Processing, (13 October 1998); doi: 10.1117/12.326829
Show Author Affiliations
Fang Ruan, Nanyang Technological Univ. (Singapore)
Yan Zhou, Nanyang Technological Univ. (Singapore)
Yee Loy Lam, Nanyang Technological Univ. (Singapore)
Jun Liu, Nanyang Technological Univ. (Singapore)
S. H. Mei, Nanyang Technological Univ. (Singapore)
ChinYi Liaw, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 3467:
Far- and Near-Field Optics: Physics and Information Processing
Suganda Jutamulia; Toshimitsu Asakura, Editor(s)

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