Mid-infrared time-resolved dual-comb spectroscopy and its applications

Pei-Ling Luo^1*

¹Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan

* Presenter:Pei-Ling Luo, email:plluo@gate.sinica.edu.tw

Mid-infrared time-resolved spectroscopy with adequate sensitivity and spectral resolution provides great opportunity to explore transient processes of light-matter interactions as well as to investigate highly reactive free radicals and intermediates. Dual-comb spectroscopy, as an emerging Fourier transform spectroscopic technique relying on two frequency combs with slightly different repetition rates, enables high-resolution and rapid spectral measurements. Here, a new approach to time-resolved infrared laser spectroscopy with dual-comb interferometry will be presented. In addition to introduction of the unique capability of our time-resolved dual-comb spectrometers, some of our recent works, such as precision measurements of line strengths of OH and HOO free radicals and accurate studies of reaction rate coefficients and product yields of key atmospheric reactions will be reported.

Keywords: optical frequency comb, time-resolved spectroscopy, Fourier transform spectroscopy, mid-infrared, free radicals