Pressure-induced self-broadening and frequency shift measurements of absorption lines of acetylene using tunable diode laser absorption spectroscopy

被引：13
|
作者：
Yelleswarapu, C [1 ]
Sharma, A [1 ]
机构：
[1] Alabama A&M Univ, Dept Phys, Normal, AL 35762 USA
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2001年 / 69卷 / 02期
关键词：
wavelength modulation; pressure induced broadening;
D O I：
10.1016/S0022-4073(00)00073-X
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Diode laser spectroscopy is used to investigate pressure-induced self-broadening as well as frequency shifts of several absorption lines in the nu (1) + 3 nu (3) overtone band around 780 nm region. A 35 meter path-length multipass cell is used to measure absorption directly as well as with the wavelength-modulation technique involving detection at first and second harmonics of the modulation frequency. Acetylene pressures in the 5-600 Torr range are used. Absorption linewidths are measured with Fabry-Perot interferometer having a free spectral range of 750 MHz. Frequency shift measurements and pressure-broadening coefficients of some spectral lines are reported for the first time. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：151 / 158
页数：8
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