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Microgroove based optical fiber refractive index sensor
Author(s): Xiangyu Wei; Zhaojun Li; Liangtao Hou; Jiuru Yang; Lingling Ran
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Paper Abstract

In this paper, an all-fiber novel fabricated Mach-Zehnder interferometer (MZI) based on refractive index (RI) sensor is presented and simulated. This RI sensor is composed of a single-mode fiber (SMF) with a core diameter of 9 μm and a multimode fiber (MMF) with a core diameter of 105 μm. The microgroove can be etched by femtosecond laser or ground by grinding machine technology. It greatly reduces the limitations of structure fabrication. The RI response of this sensor is obtained by beam propagation method. In the range of 1.33-1.334 RIU, the RI sensitivity is -10373 nm/RIU and the linearity is 99.98% by wavelength demodulation. The intensity demodulation shows a nonlinear trend, and the sensitivity increases with the increase of RI . The maximum RI sensitivity is -9614 dB/RIU, and the fitting is 98.69%. The structure has the advantages of simple manufacture, high sensitivity and good linearity. It is very suitable for the practical applications of RI sensing with high sensitivity.

Paper Details

Date Published: 20 December 2019
PDF: 9 pages
Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112094Q (20 December 2019); doi: 10.1117/12.2549939
Show Author Affiliations
Xiangyu Wei, Heilongjiang Univ. (China)
Zhaojun Li, Heilongjiang Univ. (China)
Liangtao Hou, Heilongjiang Univ. (China)
Jiuru Yang, Heilongjiang Univ. (China)
Lingling Ran, Heilongjiang Univ. (China)


Published in SPIE Proceedings Vol. 11209:
Eleventh International Conference on Information Optics and Photonics (CIOP 2019)
Hannan Wang, Editor(s)

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