Polyvinyl alcohol coated photonic crystal optical fiber sensor for humidity measurement

被引：140
|
作者：
Wong, Wei Chang [1 ]
Chan, Chi Chiu [1 ]
Chen, Li Han [1 ]
Li, Tao [2 ]
Lee, Kok Xian [1 ]
Leong, Kam Chew [3 ]
机构：
[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Div Bioengn, Singapore 637457, Singapore
[2] China Jiliang Univ, Inst Optoelect Technol, Hangzhou 310018, Zhejiang, Peoples R China
[3] Globatfoundries Singapore Pte Ltd, Singapore 738406, Singapore
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 174卷
关键词：
Humidity; Optical fiber sensor; Interferometer; Photonic crystal fiber; Polyvinyl alcohol; Cladding mode excitation; Optical device; Polymer swelling; RELATIVE-HUMIDITY; BEND; FABRICATION;
D O I：
10.1016/j.snb.2012.07.032
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A polyvinyl alcohol (PVA) coated photonic crystal optical fiber (PCF) sensor has been proposed as a relative humidity (RH) sensor. It was fabricated by collapsing the holes of PCF at both ends to form a Michelson interferometer with cladding mode excitation. PVA was dip coated onto the sensor and the interference shift was measured when the sensor was exposed to varying RH. The sensor with 9% (w/w) coating showed a high sensitivity of 0.60 nm/%RH, displayed little hysteresis, high repeatability, low cross-sensitivity to temperature and ammonia gas and stability over 7 days of testing. A rise/fall time of 300/500 ms was achieved respectively. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：563 / 569
页数：7
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