30 January 2012 Water vapor absorption spectrum measurements and its application in concentration measurement
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Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 835126 (2012) https://doi.org/10.1117/12.915943
Event: Asia Pacific Optical Sensors Conference, 2012, Sydney, Australia
Abstract
Wavelength tunable distributed feedback laser diode (DFB-LD) were utilized to measure line 1368.597nm and line 1367.862 nm absorption character of water vapor, based on it, water vapor concentration can be measured by peak absorption rate according to Beer-Lambert law. Besides, we observe that the overlap between the line 1368.597nm and line 1367.862 nm appears and become serious with the increase of gas pressure, this agrees well with the theoretical prediction, and the overlap cause difficulty to determine the absorption peak value, a scheme is presented to cope with the difficulty, it takes advantage of the peak absorption difference between 1368.597nm and 1367.862 nm, and the difference value is used to calculate the water-vapor concentration.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jun Chang, Jun Chang, Kun Chen, Kun Chen, Guoqing Zhou, Guoqing Zhou, Guangping Lv, Guangping Lv, Cunguang Zhu, Cunguang Zhu, Zhongliang Wang, Zhongliang Wang, Fujun Song, Fujun Song, Haiyong Song, Haiyong Song, Junqiang Tian, Junqiang Tian, Wenjia Hou, Wenjia Hou, Jiaqing Huang, Jiaqing Huang, } "Water vapor absorption spectrum measurements and its application in concentration measurement", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 835126 (30 January 2012); doi: 10.1117/12.915943; https://doi.org/10.1117/12.915943
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