Proceedings of SPIE - the International Society for Optical Engineering
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 με and 1°C. Finally, measurement results for a real-time system are presented.
Grossman, B. G., & Costandi, W. E. (1993). Fiber optic sensor for the simultaneous detection of strain and temperature. Paper presented at the Proceedings of SPIE - the International Society for Optical Engineering, , 1798 175-185.