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FTIR-based measurements of self-broadening and self-shift coefficients as well as line strength in the first overtone band of HCl at 1.76 µM

Li, Gang; Serdyukov, Anton; Gisi, Michael +2 more

FTIR spectra of the 2-0 band of HCl have been measured in the 5300-5900 cm^-1 spectral region at 15 different pressures (0.05-2.5 bar) and at a spectral resolution of 0.07 cm^-1. For the first time, reliable and consistent self-induced broadening and shift coefficients for the complete HCl 2-0 band have been reported. Line inte…

High pressure Cavity Ring Down Spectroscopy: Application to the absorption continuum of CO₂ near 1.7 µm

Campargue, A.; Tran, H.; Mondelain, D. +1 more

A Cavity Ring Down Spectrometer has been developed for high sensitivity absorption spectroscopy in the near infrared at pressure up to 10 bar. In order to strictly avoid perturbations of the optical alignment by pressure forces, the pre-aligned CRDS cavity is inserted inside the high pressure cell. The stability of the spectra baseline has been va…