A tunable 1.7-µm cw F2+-center laser spectrometer system that is continuously tunable from 1.43 to 1.78 µm in wavelength and has aspectral linewidth (FVWM) of 0.07 cm-1 is developed. This system is used to measure the 2-0 rotational-vibrational absorption line profiles of hydrogen chloride (HCl) at high temperatures, the Boltzmann thermal equilibrium temperature, and to determine the extent of potential interference or overlap of the HCl lines with those that are due to hot water vapor. As a demonstration of the utility of the laser spectrometer system, it is also used to measure the spectra of methane (CH4) and ethylene (C2H4) near 1.65 µm, and is routed through a fiber-optic cable to a remote site to detect a CH4 plume.
© 1993 Optical Society of America
Mohan Vaidyanathan and Dennis K. Killinger, "Tunable 17-µm laser spectrometer for optical absorption measurements of CH4, C2H4, and high-temperature HCl," Appl. Opt. 32, 847-856 (1993)