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Proceedings Paper

Core mismatching based in-fiber Michelson interferometer for liquid refractive index sensing
Author(s): Liang Han; Min Shao; Haonan Sun; Yinggang Liu; Xueguang Qiao
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Paper Abstract

An in-fiber Michelson interferometer based on core mismatching for liquid refractive index sensing is proposed and demonstrated. The sensor can be simply fabricated by fusion splicing a section of thinned core fiber (TCF) to a standard single mode fiber (SMF) without any reflection coating. The experimental results show that the sensor possesses RI sensitivity of -111.58 dB/RIU in the RI range of 1.333-1.380 RIU. The liquid temperature cross-sensitivity is experimentally analyzed and reveals that the measurement error of the liquid RI caused by temperature is -0.89×10-6 RIU/℃ in water temperature range of 25℃-80℃. The advantages of easy fabrication, high sensitivity, working on reflective intensity detection and compact size make the proposed sensor can offer promising applications in chemical, biomedical and petrochemical fields.

Paper Details

Date Published: 19 November 2019
PDF: 7 pages
Proc. SPIE 11185, Optical Design and Testing IX, 1118510 (19 November 2019); doi: 10.1117/12.2537306
Show Author Affiliations
Liang Han, Xi'an Shiyou Univ. (China)
Min Shao, Xi'an Shiyou Univ. (China)
Haonan Sun, Xi’an Shiyou Univ. (China)
Yinggang Liu, Xi'an Shiyou Univ. (China)
Xueguang Qiao, Northwest Univ. (China)

Published in SPIE Proceedings Vol. 11185:
Optical Design and Testing IX
Yongtian Wang; Pablo Benítez; Osamu Matoba, Editor(s)

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