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Proceedings Paper

Temperature-compensated fiber optic strain sensor based on polarization-rotated reflection
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Paper Abstract

A novel structure for a temperature-compensated fiber-optic strain sensor has been demonstrated both in reflection and in transmission configuration. In the transmission configuration the sensor consists of two identical (sensing and compensating) parts of a highly birefringent bow-tie polarization-maintaining fiber, spliced at 90 deg in relation to their polarization axes. If both parts remain at the same temperature, their total temperature-induced phase retardation will cancel out. The reflection configuration, incorporating the principle of polarization-rotated reflection, also has this structure but in addition requires a reflective mirror deposited at the end of the sensing section and a polarization-preserving coupler to separate the output signal. This sensor can operate using straightforward and cost-effective electronic signal processing and its gauge factor is at least 2 orders of magnitude greater than that of the most sensitive conventional strain gauges.

Paper Details

Date Published: 1 December 1990
PDF: 8 pages
Proc. SPIE 1370, Fiber Optic Smart Structures and Skins III, (1 December 1990); doi: 10.1117/12.24841
Show Author Affiliations
Wojtek J. Bock, Univ. of Quebec/Hull (Canada)
Tomasz R. Wolinski, Univ. of Quebec/Hull (Canada)

Published in SPIE Proceedings Vol. 1370:
Fiber Optic Smart Structures and Skins III
Richard O. Claus; Eric Udd, Editor(s)

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