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Compact fiber-optic diode-laser sensor system for wide-dynamic-range relative humidity measurement |
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| Authors: | 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 State Key Laboratory on Integrated Optoelectronics |
| Institution: | 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 State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China |
| Abstract: | 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 ... |
| Keywords: | DFB laser humidity sensor mode switching tunable diode laser absorption spectroscopy wide dynamic range |
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