Sol-gel silica coated optical fiber sensor for ammonia gas detection

Liu, Dejun, Mallik, Arun Kumar, Han, Wei, Wei, Fangfang, Sun, Lei, Yuan, Jinhui, Yu, Chongxiu, Farrell, Gerald, Semenova, Yuliya and Wu, Qiang (2017) Sol-gel silica coated optical fiber sensor for ammonia gas detection. In: Proceedings of the 15th International Conference on Optical Communications and Networks (ICOCN). IEEE, pp. 1-3. ISBN 9781509034918

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Abstract

A high sensitivity ammonia gas sensor based on a tapered small core single-mode fiber (SCSMF) structure for measurement of ammonia gas concentration is reported. The proposed tapered SCSMF fiber structure has a waist diameter of 13.5 μm and it is fabricated using a customized microheater brushing technique. The silica based material prepared by sol-gel method is used as a coating applied to the surface of tapered fiber structures. Experimental results show that sensor is very sensitive to ammonia. The best measurement resolution of the ammonia concentration is estimated to be 16 ppb for gas concentrations of 0.5 ppm to 2.5 ppm while the response and recovery times are less than 5 and 10 minutes respectively.

Item Type:	Book Section
Uncontrolled Keywords:	ammonia sensor, optical fiber sensor, silica, small core single mode fiber
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Ay Okpokam
Date Deposited:	19 Apr 2017 10:07
Last Modified:	12 Oct 2019 19:21
URI:	http://nrl.northumbria.ac.uk/id/eprint/30512

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