Open cavity Fabry-Pérot interferometric refractometer based on C-shaped fiber

Chuang Wu; Zhengyong Liu; A. Ping Zhang; Bai-Ou Guan; Hwa-Yaw Tam

doi:10.1117/12.2059594

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2 June 2014 Open cavity Fabry-Pérot interferometric refractometer based on C-shaped fiber

Chuang Wu, Zhengyong Liu, A. Ping Zhang, Bai-Ou Guan, Hwa-Yaw Tam

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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91572F (2014) https://doi.org/10.1117/12.2059594
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We demonstrated an in-line open cavity Fabry–Pérot interferometer (FPI) for liquid refractive index sensing with linear response and high sensitivity. The FPI was fabricated by splicing a short piece of C-shaped fiber (tens of micrometers) between two standard single-mode fibers. The refractive index response of the FPI was characterized by ethanol-water mixtures in the range of 1.33 to 1.36, and a high sensitivity of 1294 nm/RIU at the wavelength of 1550 nm was achieved. The sensor was used to measure the thermo-optic coefficient of pure water, and the results agree well with the literature.

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Chuang Wu, Zhengyong Liu, A. Ping Zhang, Bai-Ou Guan, and Hwa-Yaw Tam "Open cavity Fabry-Pérot interferometric refractometer based on C-shaped fiber", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91572F (2 June 2014); https://doi.org/10.1117/12.2059594

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