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Proceedings Paper

Application of wavelength scanning for measuring water vapour concentration by distributed laser diode
Author(s): Jun Chang; Lv Guangping; Guoqing Zhou; Kun Chen; Yan Zhang; Zhongliang Wang; Shicong Zhang; Qiang Wang; Fujun Song
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Paper Abstract

A technique which takes advantage of distributed feedback laser diode (DFB-LD) wavelength scanning to measure water vapor concentration is presented. Concentration is gotten by peak absorption rate according to Beer-Lambert law and absorption coefficient of water vapor in HITRAN database. Theoretical work on the pressure affection to light intensity absorption rate has been done, a scheme is presented to cope with the affection of overlap of two adjacent lines, 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: 17 September 2011
PDF: 6 pages
Proc. SPIE 8120, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications V, 812004 (17 September 2011); doi: 10.1117/12.892685
Show Author Affiliations
Jun Chang, Shandong Univ. (China)
Lv Guangping, Shandong Univ. (China)
Guoqing Zhou, Shandong Univ. (China)
Kun Chen, School of CPC Shandong Provincial Party Committee (China)
Yan Zhang, Shandong Univ. (China)
Zhongliang Wang, Shandong Univ. (China)
Shicong Zhang, Shandong Univ. (China)
Qiang Wang, Shandong Univ. (China)
Fujun Song, Shandong Univ. (China)


Published in SPIE Proceedings Vol. 8120:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications V
Shizhuo Yin; Ruyan Guo, Editor(s)

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