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20 August 2019 Highly sensitive chloride ion concentration measurement based on a multitaper modulated fiber
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Abstract

A chloride ion sensor based on a multitaper modulated fiber fabricated via arc discharge is proposed and studied experimentally and theoretically. The sensing unit consists of four periodic tapers with a diameter of 28.24  μm, a period of 676  μm, and a total length of 2.7 mm. The results show that the concentration sensitivity values are 170 pm/(g/L) at a wavelength of 1303.60 nm and 220 pm/(g/L) at a wavelength of 1389.84 nm when the chloride ion concentration is increased from 0 to 40 g/L. The proposed sensor is characterized by a simple manufacturing process, a compact structure, and a low cost, and this sensing unit has great potential for application in marine chloride detection and environmental safety monitoring, especially for monitoring building corrosion and water pollution.

© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2019/$28.00 © 2019 SPIE
Lijiao Zu, Hongmin Zhang, Chengwei Fei, Yinping Miao, Bin Li, and Jianquan Yao "Highly sensitive chloride ion concentration measurement based on a multitaper modulated fiber," Optical Engineering 58(8), 086109 (20 August 2019). https://doi.org/10.1117/1.OE.58.8.086109
Received: 5 June 2019; Accepted: 1 August 2019; Published: 20 August 2019
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