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Proceedings Paper

Optical fiber extrinsic Fabry-Perot interferometric strain sensor for multiple strain state measurements
Author(s): Vikram Bhatia; Mallika B. Sen; Kent A. Murphy; Richard O. Claus; Mark E. Jones; Jennifer L. Grace; Tuan A. Tran; Jonathan A. Greene
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Paper Abstract

A modified design of the extrinsic Fabry-Perot interferometric (EFPI) optical fiber sensor, for complete characterization of multi-component strain fields, is proposed. The novel EFPI includes a sensor head with two input fibers such that the respective reflections from the output multimode fibers end face are in quadrature. Any strain field possessing a component along the line joining the axes of the two fibers causes the initial phase difference to be modulated. The measured changes in phase difference is employed to determine this transverse component of the strain field. Absolute measurements are possible using the AEFPI sensing system. Applications of the modified sensor-head to smart materials and structures are discussed.

Paper Details

Date Published: 20 April 1995
PDF: 12 pages
Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); doi: 10.1117/12.207665
Show Author Affiliations
Vikram Bhatia, Virginia Polytechnic Institute and State Univ. (United States)
Mallika B. Sen, Virginia Polytechnic Institute and State Univ. (United States)
Kent A. Murphy, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)
Mark E. Jones, Fiber and Sensor Technologies, Inc. (United States)
Jennifer L. Grace, Fiber and Sensor Technologies, Inc. (United States)
Tuan A. Tran, Fiber and Sensor Technologies, Inc. (United States)
Jonathan A. Greene, Fiber and Sensor Technologies, Inc. (United States)


Published in SPIE Proceedings Vol. 2444:
Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation
William B. Spillman, Editor(s)

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