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Proceedings Paper

Photo-acoustic spectrometer with Ti:sapphire laser
Author(s): Vladimir V. Lazarev; Yurii N. Ponomarev; Leonid N. Sinitsa; Jia-Xian Han; Lu-Yuan Hao; Qing-Shi Zhu
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Paper Abstract

A dual-channel photo-acoustic (PA) spectrometer using a single mode 1 W Ti-Sapphire laser with 50 kHz linewidth is described. The value of minimal detectable absorption coefficient equals of 10-8cm-1 was determined from the measurements of water absorption lines with well-known intensities. The PA spectrometer was applied to record weak absorption spectra of water, HDO, SiH4, H2Se, AsH3 in 11,300 - 12,800 cm-1 region. The photo-acoustic (PA) method based on the measurements of an optical radiation absorption by the substance under study. When the pulsed optical radiation passes through the cell containing an absorbing substance (molecular gas in our case) the last one heats due to the absorption. The heat of the gas in a closed volume of the PA cell produces the pulse of the pressure (Delta) p, which was detected by a sensitive microphone proportional optical radiation energy W and absorption coefficient of gas k(v).

Paper Details

Date Published: 3 March 1997
PDF: 4 pages
Proc. SPIE 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy, (3 March 1997); doi: 10.1117/12.267776
Show Author Affiliations
Vladimir V. Lazarev, Institute of Atmospheric Optics (Russia)
Yurii N. Ponomarev, Institute of Atmospheric Optics (Russia)
Leonid N. Sinitsa, Institute of Atmospheric Optics (Russia)
Jia-Xian Han, Univ. of Science and Technology of China (China)
Lu-Yuan Hao, Univ. of Science and Technology of China (China)
Qing-Shi Zhu, Univ. of Science and Technology of China (China)

Published in SPIE Proceedings Vol. 3090:
12th Symposium and School on High-Resolution Molecular Spectroscopy
Leonid N. Sinitsa; Yurii N. Ponomarev; Valery I. Perevalov, Editor(s)

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