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Proceedings Paper

Fiber-Optic Linear Displacement Sensor Based On Matched Interference Filters
Author(s): Peter L. Fuhr; Heidi C. Feener; W. B. Spillman Jr.
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Paper Abstract

A fiber optic linear displacement sensor has been developed in which a pair of matched interference filters are used to encode linear position on a broadband optical signal as relative intensity variations. As the filters are displaced, the optical beam illuminates varying amounts of each filter. Determination of the relative intensities at each filter pairs' passband is based on measurements acquired with matching filters and photodetectors. Source power variation induced errors are minimized by basing determination of linear position on signal Visibility. A theoretical prediction of the sensor's performance is developed and compared with experiments performed in the near IR spectral region using large core multimode optical fiber.

Paper Details

Date Published: 13 February 1990
PDF: 12 pages
Proc. SPIE 1169, Fiber Optic and Laser Sensors VII, (13 February 1990); doi: 10.1117/12.963065
Show Author Affiliations
Peter L. Fuhr, University of Vermont (United States)
Heidi C. Feener, University of Vermont (United States)
W. B. Spillman Jr., Hercules Aerospace Company (United States)

Published in SPIE Proceedings Vol. 1169:
Fiber Optic and Laser Sensors VII
Ramon P. DePaula; Eric Udd, Editor(s)

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