Temperature dependence of highly sensitive diode laser harmonic detection for CO molecule

Jian Bao; Lunhua Deng; Hong Fan; Jingsong Li; Xiaoming Gao; Weijun Zhang

doi:10.1117/12.619882

12 May 2005 Temperature dependence of highly sensitive diode laser harmonic detection for CO molecule

Jian Bao, Lunhua Deng, Hong Fan, Jingsong Li, Xiaoming Gao, Weijun Zhang

Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005) https://doi.org/10.1117/12.619882
Event: Optical Technologies for Atmospheric, Ocean, and Environmental Studies, 2004, Beijing, China

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.

Citation Download Citation

Jian Bao, Lunhua Deng, Hong Fan, Jingsong Li, Xiaoming Gao, and Weijun Zhang "Temperature dependence of highly sensitive diode laser harmonic detection for CO molecule", Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); https://doi.org/10.1117/12.619882

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