Line Strengths and Self-Broadening of Pure Rotational Lines of Carbon Monoxide and Nitrous Oxide Measured by Terahertz Time-Domain Spectroscopy

Terahertz time-domain spectroscopy was used to obtain the line intensities and selfbroadening parameters of pure rotational lines of CO and N2O. The technique yields a direct measurement of an absorption spectrum from 0:2 THz to 3 THz, which is linear in amplitude, therefore allowing the profiles of multiple lines to be observed and quantified. The transitions studied in CO were from J′ = 3