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Optical frequency comb-based measurements and the revisited assignment of high-resolution spectra of CH_2Br_2 in the 2960 to 3120 cm^(-1) region

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Optical frequency comb-based measurements and the revisited assignment of high-resolution spectra of CH_2Br_2 in the 2960 to 3120 cm^(-1) region

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  • Author: I. Sadiek, A. Hjältén, F. C. Roberts, J.a H. Lehman, and A. Foltynowicz
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, CH2Br2, from 2960 cm−1 to 3120 cm−1 by two optical frequency comb-based methods, Fourier transform spectroscopy and a spatially dispersive method based on a virtually imaged phased array.

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