23 December 2016 Spectral interferometric fiber optic temperature sensor with enhanced sensitivity
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Proceedings Volume 10142, 20th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 101421U (2016) https://doi.org/10.1117/12.2262960
Event: 20th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2016, Jasna, Slovakia
Abstract
Spectral interferometric techniques utilizing the interference of polarization modes in a highly birefringent (HB) elliptical-core fiber to measure temperature are analyzed experimentally. First, an experimental setup comprising a white-light source, a polarizer, a sensing birefringent fiber, an analyzer and a spectrometer is considered. Temperature sensing by this method is based on the wavelength interrogation. Second, the above setup is extended by a birefringent quartz crystal to increase the sensitivity of the temperature sensing. Third, the above setup is extended by an analyzer, and the combination of a polarizer, a birefringent quartz crystal and an analyzer represents another interferometer, which is used to increase the sensitivity of the temperature sensing. In this case the Vernier effect is present and the resultant spectrum is with an envelope, which is utilized in temperature sensing. We reached a sensitivity of 0.56 nm/K in the third setup, compared to -0.12 nm/K and -0.19 nm/K in the first and the second setup, respectively.
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J. Militky, J. Militky, M. Kadulova, M. Kadulova, P. Hlubina, P. Hlubina, } "Spectral interferometric fiber optic temperature sensor with enhanced sensitivity", Proc. SPIE 10142, 20th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 101421U (23 December 2016); doi: 10.1117/12.2262960; https://doi.org/10.1117/12.2262960
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