Optical fiber temperature and humidity sensor based on polyvinyl alcohol-aluminum film

被引：0

作者：

Bi, Wei-Hong ^{[1
,2
]}

Zhu, Chang-Qing ^{[1
]}

Fu, Xing-Hu ^{[1
,2
]}

Fu, Guang-Wei ^{[1
,2
]}

Zhang, Bao-Jun ^{[1
,2
]}

机构：

[1] School of Information Science and Engineering, Yanshan University, Qinhuangdao, China

[2] Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, Yanshan University, Qinhuangdao, China

来源：

Guangdianzi Jiguang/Journal of Optoelectronics Laser | 2014年 / 25卷 / 08期

关键词：

Metallic films - Polyvinyl alcohols - Optical fiber fabrication - Thickness measurement - Atmospheric humidity - Humidity sensors - Temperature measurement - Temperature sensors - Single mode fibers;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

An optical evanescent wave coupling temperature and humidity sensor based on polyvinyl alcohol-aluminum film is proposed, including a humidity measurement sensor and a temperature compensation sensor. In the single mode fiber fused taper area, the humidity measurement sensor is fabricated after being coated with the polyvinyl alcohol humidity sensitive material film. The temperature compensation sensor is fabricated by depositing the aluminum film on the humidity measurement sensor surface. In experiment, an amplified spontaneous emission (ASE) light source is used for detecting signals and an optical power meter is designed to measure the output of sensor. The humidity measurement sensor is used to detect humidity only, while the temperature compensation sensor only reflects the variation of environmental temperature. These two sensors work at the same time and the latter is used to compensate the temperature variation in the former. The experimental results show that when the taper length is 14.04 mm and the polyvinyl alcohol coating thickness is 2.2 μm, the humidity sensitivity is 0.1541 dBm/%, the temperature sensitivity is 0.0193 dBm/, and the humidity measurement range can achieve 50%~98%. When the aluminum film thickness is 168.63 nm, the temperature compensation sensor sensitivity is 0.0191 dBm/. So the developed device can realize the temperature compensation for humidity measurement sensor.

引用

页码：1443 / 1448