Low-cost high-performance fiber-optic pH sensor based on thin-core fiber modal interferometer

被引：135
作者：
Gu, Bobo [1 ]
Yin, Ming-Jie [2 ]
Zhang, A. Ping [1 ]
Qian, Jin-Wen [2 ]
He, Sailing [1 ,3 ]
机构：
[1] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China
[2] Zhejiang Univ, Minist Educ, Key Lab Macromol Synth & Functionalizat, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China
[3] Royal Inst Technol, Sch Elect Engn, Div Electromagnet Engn, S-10044 Stockholm, Sweden
来源：
OPTICS EXPRESS | 2009年 / 17卷 / 25期
关键词：
FABRICATION; GRATINGS; LAYER;
D O I：
10.1364/OE.17.022296
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new fiber-optic pH sensor based on a thin-core fiber modal interferometer with electrostatic self-assembled nanocoating is presented. After inserting a segment of thin-core fiber into a standard single-mode fiber, high-order cladding modes are excited and interfere with the core mode to form an in-fiber modal interferometer. The side surface of the sensor is then deposited with poly(allylamine hydrochloride) and poly(acrylic acid) nanocoating by electrostatic self-assembly technique. A fast and linear response is obtained in either acid or alkali solution (in the pH range 2.5 to 10) with resolution of 0.013 pH unit. (C) 2009 Optical Society of America
引用
收藏
页码：22296 / 22302
页数：7
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