Optical frequency comb-based measurements and the revisited assignment of high-resolution spectra of CHBr in the 2960 to 3120 cm region.

Brominated organic compounds are toxic ocean-derived trace gases that affect the oxidation capacity of the atmosphere and contribute to its bromine burden. Quantitative spectroscopic detection of these gases is limited by the lack of accurate absorption cross-section data as well as rigorous spectroscopic models. This work presents measurements of high-resolution spectra of dibromomethane, CHBr, from 2960 cm to 3120 cm by two optical frequency comb-based methods, Fourier transform spectroscopy and a spatially dispersive method based on a virtually imaged phased array.

Infrared frequency comb spectroscopy of CHI: Influence of hot bands and pressure broadening on the ν and ν fundamental transitions.

Direct frequency comb spectroscopy was utilized to measure the vibrational absorption spectrum of diiodomethane, CHI, from 2960 to 3125 cm. The data were obtained using a CHI concentration of (6.8 ± 1.