Refractive index sensor based on theta-shaped microfiber resonator and Vernier effect

Zhilin Xu; Yiyang Luo; Qizhen Sun; Perry Ping Shum; Zhifang Wu; Xuguang Shao; Deming Liu

doi:10.1117/12.2265277

23 April 2017 Refractive index sensor based on θ-shaped microfiber resonator and Vernier effect

Zhilin Xu, Yiyang Luo, Qizhen Sun, Perry Ping Shum, Zhifang Wu, Xuguang Shao, Deming Liu

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103233N (2017) https://doi.org/10.1117/12.2265277
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

A compact refractive index (RI) sensing probe with controllable sensitivities based on a θ-shaped microfiber resonator and Vernier effect is reported. By cascading the θ-shaped microfiber resonator with a fiber Fabry-Perot interferometer, Vernier effect is generated to enhance the RI sensitivity. Both theoretical analyses and experimental results demonstrate that the RI sensitivity can be tuned by changing the cavity length of the θ-shaped microfiber resonator. The RI sensitivity is widely tuned from 311.77nm/RIU to 2460.07nm/RIU in the experiment. The θ-shaped microfiber resonator and the proposed method of generating Vernier effect could find important applications in optical fiber sensing field.

Citation Download Citation

Zhilin Xu, Yiyang Luo, Qizhen Sun, Perry Ping Shum, Zhifang Wu, Xuguang Shao, and Deming Liu "Refractive index sensor based on θ-shaped microfiber resonator and Vernier effect", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103233N (23 April 2017); https://doi.org/10.1117/12.2265277

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