Composite cavity fiber tip Fabry-Perot interferometer for temperature sensing

Li Zhao; Yundong Zhang; Yunhao Chen; Jinfang Wang; Huaiyin Su; Ying Guo; Fuxing Zhu

doi:10.1117/12.2515591

26 March 2019 Composite cavity fiber tip Fabry-Perot interferometer for temperature sensing

Li Zhao, Yundong Zhang, Yunhao Chen, Jinfang Wang, Huaiyin Su, Ying Guo, Fuxing Zhu

Proceedings Volume 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology; 1093402 (2019) https://doi.org/10.1117/12.2515591
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

A simple composite cavity fiber tip (CCFT) Fabry-Perot interferometer (FPI) is proposed and experimentally demonstrated. The composite cavity is composed of an air cavity and a silica cavity. The air cavity is an elliptical air hole embedded in the SMF. The silica cavity is a short section of SMF cascaded to the air cavity. The CCFT FPIs were applied for temperature sensing. To take advantage of the FP’s resonant property, a laser whose wavelength is tuned to the steep slope of one of the FP resonances is used to interrogate the CCFT FPI system. With a laser interrogation, a small wavelength shift caused by a small temperature change will then be translated into a large change in output power, which can be easily detected. Therefore, the temperature sensitivity can be enhanced significantly, and the CCFT FPI can routinely resolve much smaller temperature changes.

Citation Download Citation

Li Zhao, Yundong Zhang, Yunhao Chen, Jinfang Wang, Huaiyin Su, Ying Guo, and Fuxing Zhu "Composite cavity fiber tip Fabry-Perot interferometer for temperature sensing", Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 1093402 (26 March 2019); https://doi.org/10.1117/12.2515591

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