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17 March 2023 Real-time high resolution dual-comb spectroscopy in the 6-12 µm spectral range based on a few-cycle Cr:ZnS laser platform
Sergey Vasilyev, Andrey Muraviev, Dmitrii Konnov, Mike Mirov, Sergey Mirov, Konstantin L. Vodopyanov
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Proceedings Volume PC12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII; PC1240501 (2023) https://doi.org/10.1117/12.2653360
Event: SPIE LASE, 2023, San Francisco, California, United States
Abstract
By using a compact duo of few-cycle Cr:ZnS lasers as a pump source and using optical rectification in ZGP crystal, we demonstrate high-resolution dual-comb spectroscopy in the long-wave infrared (LWIR) region. By recording a sequence of 1500 interferograms, we resolved the comb modes with the finesse exceeding 1000; LWIR spectra of several molecules including methanol, nitrous oxide, and ammonia were recorded in real time (1-10 sec) with 80-MHz (comb spacing) resolution with ~300,000 spectral points (comb modes), and the signal-to-noise ratio of ~100.
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Sergey Vasilyev, Andrey Muraviev, Dmitrii Konnov, Mike Mirov, Sergey Mirov, and Konstantin L. Vodopyanov "Real-time high resolution dual-comb spectroscopy in the 6-12 µm spectral range based on a few-cycle Cr:ZnS laser platform", Proc. SPIE PC12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII, PC1240501 (17 March 2023); https://doi.org/10.1117/12.2653360
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KEYWORDS
Spectroscopy
Spectral resolution
Long wavelength infrared
Crystals
Nonlinear crystals
Signal to noise ratio
Molecules
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