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Proceedings Paper

Liquid salinity sensor based on D-shaped single mode fibers coated with In-Ga-Zn-O thin film
Author(s): Chuen-Lin Tien; Hao-Sheng Mao; Hong-Yi Lin; Wen-Shing Sun
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Paper Abstract

This paper presents a new thin-film liquid salinity sensor by using the D-shaped fiber and thin-film coating techniques. The D-shaped fiber will enhance optical fiber to generate an evanescent field in sensing applications. Indium-galliumzinc oxide (IGZO) films can produce high attenuation lossy mode resonance (LMR) to make high-sensitivity liquid salinity fiber sensors. IGZO thin film is prepared by a radio-frequency (RF) magnetron sputtering method. The optical fiber thickness is 67.6 μm and IGZO film thickness of 100 nm is deposited on the polished surface of the D-shaped fiber to fabricate LMR-type liquid salinity sensors. The sensitive region was immersed in different sensing liquid salinities from 0 ‰ to 100 ‰, and attempted to investigate the sensitivities of the LMR salinity sensors. The experimental results show that the highest sensitivity of the salinity sensors for the sensing NaCl solutions is 0.80 nm per salinity unit (SU).

Paper Details

Date Published: 11 November 2016
PDF: 5 pages
Proc. SPIE 10150, Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016), 101500Z (11 November 2016); doi: 10.1117/12.2243813
Show Author Affiliations
Chuen-Lin Tien, Feng Chia Univ. (Taiwan)
Hao-Sheng Mao, Feng Chia Univ. (Taiwan)
Hong-Yi Lin, Feng Chia Univ. (Taiwan)
Wen-Shing Sun, National Central Univ. (Taiwan)

Published in SPIE Proceedings Vol. 10150:
Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016)
Agus M. Hatta; Aulia M. T. Nasution, Editor(s)

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