Interferometric optical fiber sensors for absolute measurement of displacement and strain

Alan D. Kersey; Timothy A. Berkoff; Anthony D. Dandridge

doi:10.1117/12.45977

1 August 1991 Interferometric optical fiber sensors for absolute measurement of displacement and strain

Alan D. Kersey, Timothy A. Berkoff, Anthony D. Dandridge

Proceedings Volume 1511, Fiber Optic Sensors: Engineering and Applications; (1991) https://doi.org/10.1117/12.45977
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

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.

Citation Download Citation

Alan D. Kersey, Timothy A. Berkoff, and Anthony D. Dandridge "Interferometric optical fiber sensors for absolute measurement of displacement and strain", Proc. SPIE 1511, Fiber Optic Sensors: Engineering and Applications, (1 August 1991); https://doi.org/10.1117/12.45977

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