Mid-infrared high-resolution time-resolved dual-comb spectroscopy

Pei-Ling Luo^1*

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

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

Time-resolved infrared spectroscopy, offering both temporal and spectral resolution in the spectral measurements, plays an important role in atmospheric, biological, and chemical physics studies. Here, we present a new approach to achieve time-resolved infrared spectroscopy with an electro-optic dual-comb spectrometer near 3 μm. Employing the dual-comb spectrometer coupled with a Herriott multipass reaction cell, simultaneous determination of multiple species, including methanol, formaldehyde, HO₂ and OH radicals can be achieved. Moreover, quantitative spectral analyses of the high-resolution and tens of microsecond time-resolved spectra are demonstrated.

Keywords: Time-resolved spectroscopy, Mid-infrared spectroscopy, Optical frequency comb, Dual-comb spectrometer, Fourier transform spectroscopy