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Proceedings Paper

Temperature dependence of highly sensitive diode laser harmonic detection for CO molecule
Author(s): Jian Bao; Lunhua Deng; Hong Fan; Jingsong Li; Xiaoming Gao; Weijun Zhang
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Paper Abstract

The temperature dependent of the ratio between second and first harmonic signals in wavelength modulation spectroscopy was experimentally measured. The results show the ratio decrease with the temperature increase the temperature increase from 30°C to 50°C the ratio decrease about 5%, the results is consistent with theoretical calculation. As increasing the temperature of the CO gas the ratio between second and first harmonic signals is the straight line parallel displaces downwards. Therefore the measuring concentration can be corrected by using a calibrated temperature curve in practice sensor application. The results are useful for the application of the diode laser sensor ofthe ratio detection type.

Paper Details

Date Published: 12 May 2005
PDF: 8 pages
Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); doi: 10.1117/12.619882
Show Author Affiliations
Jian Bao, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Lunhua Deng, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Hong Fan, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Jingsong Li, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Xiaoming Gao, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Weijun Zhang, Anhui Institute of Optics and Fine Mechanics, CAS (China)


Published in SPIE Proceedings Vol. 5832:
Optical Technologies for Atmospheric, Ocean, and Environmental Studies
Daren Lu; Gennadii G. Matvienko, Editor(s)

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