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Proceedings Paper

Two-mode elliptical-core weighted fiber sensors for vibration analysis
Author(s): Ashish M. Vengsarkar; Kent A. Murphy; Brian R. Fogg; William V. Miller; Jonathan A. Greene; Richard O. Claus
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Paper Abstract

Two-mode, elliptical-core optical fibers are demonstrated in weighted, distributed and selective vibration-mode-filtering applications. We show how appropriate placement of optical fibers on a vibrating structure can lead to vibration mode filtering. Selective vibration-mode suppression on the order of 10 dB has been obtained using tapered two-mode, circular-core fibers with tapering functions that match the second derivatives of the modes of vibration to be enhanced. We also demonstrate the use of chirped, two-mode gratings in fibers as spatial modal sensors that are equivalents of shaped piezoelectric sensors.

Paper Details

Date Published: 1 January 1992
PDF: 14 pages
Proc. SPIE 1586, Distributed and Multiplexed Fiber Optic Sensors, (1 January 1992); doi: 10.1117/12.56507
Show Author Affiliations
Ashish M. Vengsarkar, Virginia Polytechnic Institute and State Univ. (United States)
Kent A. Murphy, Virginia Polytechnic Institute and State Univ. (United States)
Brian R. Fogg, Virginia Polytechnic Institute and State Univ. (United States)
William V. Miller, Virginia Polytechnic Institute and State Univ. (United States)
Jonathan A. Greene, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 1586:
Distributed and Multiplexed Fiber Optic Sensors

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