Precision mid-IR: THz frequency combs produced by frequency division and optical rectification

Dmitrii Konnov; Sergey Vasilyev; Andrey Muraviev; Konstantin Vodopyanov

doi:10.1117/12.2653928

14 March 2023 Precision mid-IR: THz frequency combs produced by frequency division and optical rectification

Dmitrii Konnov, Sergey Vasilyev, Andrey Muraviev, Konstantin Vodopyanov

Proceedings Volume 12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII; 1240502 (2023) https://doi.org/10.1117/12.2653928
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

We present our recent results on the producing of ultra-broadband frequency combs in the mid-IR – THz range and their applications in dual-comb spectroscopy (DCS) that feature: sub-Doppler resolution, sensitivity down to part-per-billion level, and up to video-rate acquisition speed. We describe two techniques for generating frequency combs: (i) subharmonic generation in a sync-pumped optical parametric oscillator (OPO), which converts the carrier of ultrafast pulses to half that frequency and augments the spectrum to more than one octave, and (ii) optical rectification from few-optical-cycle 2.4- μm mode-locked lasers that produces a frequency downconverted output in the whole range from 1.5 to 50 THz and with the frequency span up to two octaves (e.g. 7.5–30 μm). We describe two approaches to the spectroscopic technique: (i) DCS with two mutually coherent mid-IR beams, and (ii) DCS with electro-optic sampling (EOS).

Conference Presentation

Citation Download Citation

Dmitrii Konnov, Sergey Vasilyev, Andrey Muraviev, and Konstantin Vodopyanov "Precision mid-IR: THz frequency combs produced by frequency division and optical rectification", Proc. SPIE 12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII, 1240502 (14 March 2023); https://doi.org/10.1117/12.2653928

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