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Proceedings Paper

Refractive index sensing based on Mach-Zehnder interferometer formed by three cascaded single-mode fiber tapers
Author(s): Tao Zhu; Di Wu; Ming Deng; Dewen Duan; Yunjiang Rao; Xiaoyi Bao
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Paper 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.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77532P (17 May 2011); doi: 10.1117/12.884842
Show Author Affiliations
Tao Zhu, Chongqing Univ. (China)
Univ. of Ottawa (Canada)
Di Wu, Chongqing Univ. (China)
Ming Deng, Chongqing Univ. (China)
Dewen Duan, Chongqing Univ. (China)
Yunjiang Rao, Univ. of Ottawa (China)
Univ. of Electronic Science & Technology of China (China)
Xiaoyi Bao, Univ. of Ottawa (Canada)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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