Miniature pH sensor based on thin-core fiber Mach-Zehnder interferometer

被引：0
作者：
Zhou, Menghui [1 ]
Dong, Xinyong [1 ]
Ma, Qifei [1 ]
Chan, Chi Chiu [2 ]
机构：
[1] China Jiliang Univ, Inst Optoelect Technol, Hangzhou 310018, Peoples R China
[2] Nanyang Technol Univ, Sch Chem & Biomed Engn, Div Bioengn, Singapore 637457, Singapore
来源：
2017 16TH INTERNATIONAL CONFERENCE ON OPTICAL COMMUNICATIONS & NETWORKS (ICOCN 2017) | 2017年
基金：
中国国家自然科学基金;
关键词：
Optical fiber sensors; thin-core fibers; pH sensors; Mach-Zehnder interferometer;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A miniature pH sensor by using a tapered thin-core optical fiber based Mach-Zehnder interferometer coated with a pH sensitive film is demonstrated. Polyvinyl alcohol (PVA) and polyacrylic acid (PAA) were used to form a membrane structure on the taper by laminating self-assembly technique. By measuring wavelength change of the interference pattern or optical intensity, we achieved high sensitivity pH value measurement up to 2.06 nm/pH unit. The proposed sensor has small size, simple structure, good stability and a relatively short response time less than 52 s.
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页数：3
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