标题：An optical fiber humidity sensor based on optical absorption
作者：Wang, Biao ;Zhang, Fujun ;Pang, Fufei ;Wang, Tingyun
作者机构：[Wang, Biao ;Zhang, Fujun ;Pang, Fufei ;Wang, Tingyun ] Key Lab. of Specialty Fiber Optics and Optical Access Networks, School of Communication and In 更多
会议名称：Optical Sensors and Biophotonics III
会议日期：13 November 2011 through 16 November 2011
来源：Proceedings of SPIE - The International Society for Optical Engineering
关键词：Cobalt chloride; Humidity sensor; Sol-gel; Spin coating
摘要：A simple optical fiber relative humidity (RH) sensor was proposed and demonstrated. The humidity sensor was fabricated by coating moisture-sensitive film on the end face of a multi-mode optical fiber. The film was synthesized by doping CoCl 2 into a PVA/SiO 2 composite solution. Based on an optical absorption technique, the sensor head was characterized. From the optical absorption, a relative humidity range of 25%∼65% was detected. Furthermore, the sensor has good repetitive response, and the response time was less than 2 min. © 2011 SPIE-OSA-IEEE.