Distributed fiber optic strain sensor based on the Sagnac and Michelson interferometers

Eric Udd

doi:10.1117/12.238840

22 April 1996 Distributed fiber optic strain sensor based on the Sagnac and Michelson interferometers

Eric Udd

Proceedings Volume 2719, Smart Structures and Materials 1996: Smart Systems for Bridges, Structures, and Highways; (1996) https://doi.org/10.1117/12.238840
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

Abstract

By placing fiber optic gratings in a Sagnac loop a distributed strain sensor may be formed by using the light reflected from the fiber gratings as sources for balanced Michelson and Mach- Zehnder interferometers. In this manner the resulting fiber optic sensor is capable of measuring integrated strain over lengths determined by the fiber grating position, point strain and temperature at the fiber grating locations and localizing and measuring the position of a time varying signal such as an acoustic wave.

Citation Download Citation

Eric Udd "Distributed fiber optic strain sensor based on the Sagnac and Michelson interferometers", Proc. SPIE 2719, Smart Structures and Materials 1996: Smart Systems for Bridges, Structures, and Highways, (22 April 1996); https://doi.org/10.1117/12.238840

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