Refractive index sensing based on Mach-Zehnder interferometer formed by three cascaded single-mode fiber tapers

Tao Zhu; Di Wu; Ming Deng; Dewen Duan; Yunjiang Rao; Xiaoyi Bao

doi:10.1117/12.884842

17 May 2011 Refractive index sensing based on Mach-Zehnder interferometer formed by three cascaded single-mode fiber tapers

Tao Zhu, Di Wu, Ming Deng, Dewen Duan, Yunjiang Rao, Xiaoyi Bao

Author Affiliations +

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77532P (2011) https://doi.org/10.1117/12.884842
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

We report the fabrication of a highly sensitive refractive-index sensor based on three cascaded single-mode fiber tapers, in which a weak taper is sandwiched between the two tapers to improve the sensitivity of the sensor. Experimental results show that the sensitivity of the device is 0.286 nm for a 0.01 RI change, which is about eleven times higher than that of the normal two cascaded tapers MZ interferometer. Such kind of low-cost and highly sensitive fiber-optic refractive index sensors will find applications in chemical or bio-chemical sensing fields.

Citation Download Citation

Tao Zhu, Di Wu, Ming Deng, Dewen Duan, Yunjiang Rao, and Xiaoyi Bao "Refractive index sensing based on Mach-Zehnder interferometer formed by three cascaded single-mode fiber tapers", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77532P (17 May 2011); https://doi.org/10.1117/12.884842

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