Self-broadening and self-shift in the $3{\nu }_2$ band of ammonia from mid-infrared-frequency-comb spectroscopy

Abstract

We report the broadband absorption spectrum of the $3{\nu }_2$ band of ${}^{14}$NH${}_3$ near 4 $\mu m$. The data were recorded using a mid-infrared frequency comb coupled to a homebuilt Fourier-transform spectrometer with a resolution of 0.00501 $c{m}^{-1}$. Line positions, line intensities, self-broadening, and self-shift parameters for six rovibrational lines were determined at room temperature ($T=296$ K). Comparison with HITRAN 2016 shows good agreement at improved precision. The high precision and the rapid tunability of our experiment enables advanced fast spectroscopy of molecular gases.

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Cited by in corpus (1)

• Near-to mid-IR spectral purity transfer with a tunable frequency comb: methanol frequency metrology over a record frequency span