Compact fiber-optic diode-laser sensor system for wide-dynamic-range relative humidity measurement  

作　　者：SUN Ke, XIE Liang JU Yu WU XuMing HOU Jie HAN Wei WANG Xin MAN JiangWei LIU Yu YUAN HaiQing LUO ZhenAo XIONG Shang ZHU NingHua 

机构地区：[1]State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

出　　处：《Chinese Science Bulletin》2011年第32期3486-3492,共7页

基　　金：supported by the Meteorology Industry Research Project of China (GYHY200806033, GYHY201006045);the National Natural Science Foundation of China (61021003, 61090391, 60837001, 60820106004);the National High-Technology Research and Development Program of China (2009AA03Z409);the Open Fund of Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), Ministry of Education

摘　　要：A compact fiber-optic diode-laser sensor system for measuring relative humidity is studied. In such a system, a distributed feedback laser lasing near 1877 nm is used as light source while a high-precision Pt resistance as temperature sensor, an accuracy of 0.1% relative-humidity can be achieved. The laser sensor system is able to lock to the absorption peak and calculate the density of water vapor without any additional reference measurements. Using programs built in to the microcontroller unit, the laser system can switch functions between direct measurement at high density and second-harmonic detection at low density. The system can switch between the two modes automatically and work in a wide dynamic range.A compact fiber-optic diode-laser sensor system for measuring relative humidity is studied. In such a system, a distributed feed- back laser lasing near 1877 nm is used as light source while a high-precision Pt resistance as temperature sensor, an accuracy of 0.1% relative-humidity can be achieved. The laser sensor system is able to lock to the absorption peak and calculate the density of water vapor without any additional reference measurements. Using programs built in to the microcontroller unit, the laser system can switch functions between direct measurement at high density and second-harmonic detection at low density. The system can switch between the two modes automatically and work in a wide dynamic range.

关 键 词：湿度测量系统 激光二极管 宽动态范围 光纤传感器 紧凑型 铂电阻温度传感器 传感器系统 相对湿度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]