Selective optothermal detection of NO2 and H2O with a frequency-tuned CO waveguide laser

CO laser line wavenumbers and absorption of their radiation by gaseous nitrogen oxides

“…The use of a CO laser for gas analysis of the atmosphere is reflected in [26][27][28][29][30][31][32]. Important results were obtained in experiments on V E [14] , cm −1 E [14] -E [19] , cm −1 E [14] -E [20] , cm −1 E [14] -E, cm −1 the interaction of CO laser radiation with high-temperature media, including the exhaust of aircraft engines [33][34][35].…”

“…According to [37], the output parameters of the laser radiation depend on noise sources (fluctuations in the gas discharge and acoustic influence on the length Table 8. Comparison of the calculated absorption coefficients of NO 2 with experimental values of [35]. and geometry of a resonator) which vary the center of laser lines.…”

“…In table 8, the values of calculated and measured [35] NO 2 absorption coefficients are shown. In [35], the experimental data were recorded with 12 C 16 O and 13 C 16 O lasers at room temperature (T = 300 K).…”

“…In table 8, the values of calculated and measured [35] NO 2 absorption coefficients are shown. In [35], the experimental data were recorded with 12 C 16 O and 13 C 16 O lasers at room temperature (T = 300 K). The discrepancies between experimental and theoretical values only in some cases fall into experimental uncertainty, estimated to be 10%.…”

CO Laser Absorption Coefficients for Gases of Biological Relevance: H2O, CO2, Ethanol, Acetaldehyde, and Ethylene

“…5 Operation at these lines is dif® cult, or even impossible, with a liquid nitrogen-cooled CO laser, where mainly low J-lines are accessible. 10 ±12 c Published data usually relate data obtained at a total sample pressure below 1 bar, 10 whereas in practice m easurements are comm only carried out at atmospheric pressures; pressure broadening can lead to signi® -cantly different results.…”