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- W3082085603 abstract "Fourier-transform infrared spectroscopy (FTIR) is the golden standard of mid-infrared (MIR) molecular spectroscopic analysis through optically-encoded vibrational signatures. Michelson-type FTIR and MIR dual-comb spectrometers allow us to simultaneously investigate multiple molecular species via the broadband and high-resolution spectroscopic capabilities. However, these are not applicable to high-speed measurements due to the low temporal resolution which is fundamentally limited by the signal-to-noise ratio (SNR). In this study, we develop a high-speed FTIR spectroscopy technique called phase-controlled Fourier-transform infrared spectroscopy (PC-FTIR) that has the capability to measure MIR absorption spectra at a rate of above 10 kHz. PC-FTIR demonstrates the high scan rate with a high SNR for various spectral bandwidths by arbitrarily adjusting the instrumental spectral resolution. As a proof of principle demonstration, we measure high-speed mixing dynamics of two liquids at a rate of 24 kHz. We also measure MIR spectra of gas-phase molecules with higher spectral resolution at a rate of 12 kHz. This high-speed MIR spectrometer could be especially useful for measuring non-repetitive fast phenomena and acquiring a large amount spectral data within a short time." @default.
- W3082085603 created "2020-09-08" @default.
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- W3082085603 date "2020-08-30" @default.
- W3082085603 modified "2023-09-30" @default.
- W3082085603 title "High-speed Fourier-transform infrared spectroscopy with phase-controlled delay line" @default.
- W3082085603 doi "https://doi.org/10.48550/arxiv.2008.13342" @default.
- W3082085603 hasPublicationYear "2020" @default.
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