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Proceedings Paper

High-sensitivity Mach-Zehnder interferometric refractive index sensor based on two different ultra-abrupt tapers
Author(s): Xiufeng Shen; Le Xu; Sumei Wang
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Paper Abstract

A high-sensitivity Mach-Zehnder(MZ) interferometric refractive index(RI) sensor based on two different ultra-abrupt tapers is proposed and demonstrated experimentally. The whole fabrication process is relatively simple. One taper is fabricated by the fusion-splicing method and the ratio of the waist diameter to the taper length is 1:1. The other taper is fabricated by CO2 laser irradiation with a ratio around 1:10. According to the experimental results, the spectral loss of the proposed MZ interferometric sensor has a linear response to the external RI change with a ultrahigh sensitivity of -412.02138 dB/RIU(refractive index unit) in the range of 1.3505-1.3684. The sensor has the potential application for RI measurement in chemical or biochemical sensing fields due to its low cost, simple structure and extremely high sensitivity.

Paper Details

Date Published: 19 February 2015
PDF: 6 pages
Proc. SPIE 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014), 94491X (19 February 2015); doi: 10.1117/12.2074872
Show Author Affiliations
Xiufeng Shen, Beijing Institute of Technology (China)
Le Xu, Beijing Institute of Technology (China)
Sumei Wang, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 9449:
The International Conference on Photonics and Optical Engineering (icPOE 2014)
Ailing Tian; Anand Asundi; Weiguo Liu; Chunmin Zhang, Editor(s)

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