Title :
Laser photoacoustic measurement of infrared spectral line profiles
Author :
Yamakawa, S. ; Sokabe, N.
Author_Institution :
Dept. of Appl. Phys., Osaka City Univ., Japan
fDate :
Aug. 30 1999-Sept. 3 1999
Abstract :
Spectral line profiles of thirteen infrared transitions of normal methanol and ethylene have been measured with the CO/sub 2/ laser photoacoustic detection technique. Pressure broadening, pressure shifts and offsets from the CO/sub 2/ line centers are reported. The theoretical description of the photoacoustic line profile and the method of obtaining undistorted line profiles are presented along with the possible application of the constructed system to trace gas detection.
Keywords :
infrared spectra; infrared spectroscopy; organic compounds; photoacoustic spectra; photoacoustic spectroscopy; spectral line breadth; spectral line broadening; spectral line shift; spectrochemical analysis; CO/sub 2/; CO/sub 2/ laser; CO/sub 2/ line centers; ethylene; infrared spectral line profiles; infrared transitions; laser photoacoustic measurement; methanol; photoacoustic detection technique; photoacoustic line profile; pressure broadening; pressure offsets; pressure shifts; spectral line profiles; theoretical description; trace gas detection; undistorted line profiles; Absorption; Gas detectors; Gas lasers; Infrared detectors; Infrared spectra; Laser transitions; Optical pumping; Optical saturation; Pump lasers; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on
Conference_Location :
Seoul, South Korea
Print_ISBN :
0-7803-5661-6
DOI :
10.1109/CLEOPR.1999.814732
