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Title:Doppler-free Saturated Absorption Spectroscopy Of Ch4 In The Mid-infrared Region Using A Continuous-wave Optical Parametric Oscillator
Author(s):Riyadh, S M Shah
Contributor(s):Cheng, Cunfeng; Liu, Jinjun; Haase, Brianna Paige; Haase, Meagan Nicole; Telfah, Hamzeh
Subject(s):Atmospheric science
Abstract:The fundamentals of XH stretching modes typically lie in the 2,500 – 3,700 cm$^{-1}$ (2.7 - 4.0 $\mu$m) range. Continuous-wave optical parametric oscillators (CW OPOs) enable high-resolution spectroscopy in this region. A Doppler-free saturated absorption spectroscopy apparatus with a high-power, widely tunable CW OPO as the light source has been built in our lab for high-resolution, high-precision spectroscopy of gas-phase molecules. We have obtained the Doppler-free spectrum of the Q branch of the $\nu_3$ band of CH$_4$ in a proof-of-principle experiment. Preliminary results from the experiment will be reported in this talk. A cavity-enhanced two-photon spectroscopy setup using the same CW OPO is under construction.
Issue Date:2021-06-25
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Date Available in IDEALS:2021-09-24

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