26 March 1993 Fiber optic sensor for the simultaneous detection of strain and temperature
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For simple interferometric fiberoptic sensors, the effects of strain and temperature are indistinguishable. This paper addresses that problem by demonstrating a single wavelength, two-mode polarimetric fiberoptic sensor capable of simultaneously measuring temperature and strain. The sensor consists of two interferometers, a polarimetric and a two-mode, formed in a single elliptical core fiber. The interferometers respond with different sensitivities to strain and temperature like simultaneous functions of the two variables. A technique is developed by which the outputs of the interferometers are used simultaneously to measure strain and temperature with rms errors less than 30 (mu) (epsilon) and 1 degree(s)C. Finally, measurement results for a real-time system are presented.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Barry G. Grossman, Barry G. Grossman, Walid Emil Costandi, Walid Emil Costandi, } "Fiber optic sensor for the simultaneous detection of strain and temperature", Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); doi: 10.1117/12.141314; https://doi.org/10.1117/12.141314

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