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Proceedings Paper

Water vapor absorption spectrum measurements and its application in concentration measurement
Author(s): Jun Chang; Kun Chen; Guoqing Zhou; Guangping Lv; Cunguang Zhu; Zhongliang Wang; Fujun Song; Haiyong Song; Junqiang Tian; Wenjia Hou; Jiaqing Huang
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Paper 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.

Paper Details

Date Published: 30 January 2012
PDF: 6 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 835126 (30 January 2012); doi: 10.1117/12.915943
Show Author Affiliations
Jun Chang, Shandong Univ. (China)
Kun Chen, School of CPC Shandong Provincial Party Committee, Jinan (China)
Guoqing Zhou, Shandong Univ. (China)
Guangping Lv, Shandong Univ. (China)
Cunguang Zhu, Shandong Univ. (China)
Zhongliang Wang, Shandong Univ. (China)
Fujun Song, Shandong Univ. (China)
Haiyong Song, Shandong Univ. (China)
Junqiang Tian, Shandong Univ. (China)
Wenjia Hou, Shandong Univ. (China)
Jiaqing Huang, Shandong Univ. (China)

Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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