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Proceedings Paper

Interferometric optical fiber sensors for absolute measurement of displacement and strain
Author(s): Alan D. Kersey; Timothy A. Berkoff; Anthony D. Dandridge
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Paper Abstract

Two displacement sensing techniques based on determination of the phase shift induced in an unbalanced interferometer due to laser frequency modulation are described. Experimental results demonstrating the operation of the schemes are presented; optical displacements over a 50 mm range have been recorded with a resolution of 25 microns. Both approaches are suitable for passive remote sensing applications. The authors also discuss the use of this type of sensing approach for the measurement of 'D.C.' parameters, such as quasi-static pressure and structural strain.

Paper Details

Date Published: 1 August 1991
PDF: 11 pages
Proc. SPIE 1511, Fiber Optic Sensors: Engineering and Applications, (1 August 1991); doi: 10.1117/12.45977
Show Author Affiliations
Alan D. Kersey, Naval Research Lab. (United States)
Timothy A. Berkoff, Naval Research Lab. (United States)
Anthony D. Dandridge, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 1511:
Fiber Optic Sensors: Engineering and Applications
Anastasius J.A. Bruinsma; Brian Culshaw, Editor(s)

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