Fig. 1: Schematic of high-resolution time-resolved dual-comb spectroscopy. | Communications Chemistry

Fig. 1: Schematic of high-resolution time-resolved dual-comb spectroscopy.

From: Simultaneous determination of transient free radicals and reaction kinetics by high-resolution time-resolved dual-comb spectroscopy

Fig. 1

Two mid-infrared (MIR) combs with slightly different repetition rates were combined and sent to the multi-pass Herriott cell. After passing through the Herriott cell, the dual-comb beam was detected with a photovoltaic HgCdTe (MCT) detector and digitized using a data acquisition board (DAQ). An excimer laser was used for laser photolysis of the precursor mixtures to generate radicals. After Fourier transformation of the time-dependent dual-comb interferograms and data processing, a precursor transmission spectrum before photolysis and time-resolved signal transmission spectra after photolysis were obtained.

Back to article page