Diode-laser absorption measurements of CO2 near 2.0 μm at elevated temperatures

被引:34
作者
Mihalcea, RM [1 ]
Baer, DS [1 ]
Hanson, RK [1 ]
机构
[1] Stanford Univ, Dept Mech Engn, High Temp Gasdynam Lab, Stanford, CA 94305 USA
关键词
D O I
10.1364/AO.37.008341
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A diode-laser sensor system based on absorption spectroscopy techniques has been developed for nonintrusive measurements of CO2 in high-temperature environments. Survey spectra of the CO2 (20 degrees 1,04 degrees 1)(I)-00 degrees 0 and (20 degrees 1,04 degrees 1)(II)-00 degrees 0 bands between 1.966 and 2.035 mu m (4915-5085 cm(-1)) were recorded at temperatures between 296 and 1425 K in a heated static cell and compared with calculated spectra (by using the HITRAN 96/HITEMP database) to find candidate transitions for CO2 detection. High-resolution measurements of the CO2 R(56) line shape [(20 degrees 1,04 degrees 1)(II)-00 degrees 0 band] were used to determine the transition line strength, the self-broadening half-width, and the coefficient of temperature dependence of the self-broadening half-width. The results represent what are believed to be the first measurements of CO2 absorption near 2.0 mu m with room-temperature diode lasers. Potential applications of the diode-laser sensor system include in situ combustion measurements and environmental monitoring. (C) 1998 Optical Society of America.
引用
收藏
页码:8341 / 8347
页数:7
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