High-Resolution Rotational Fourier-Transform Infrared Spectroscopy

Sergej Markmann,Martin Franckie,Mathieu Bertrand, Mehran Shahmohammad,Andres Forrer,Pierre Jouy,Mattias Beck,Jerome Faist,Giacomo Scalari

2022 47TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ 2022)（2022）

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摘要

We demonstrate a rotational optical delay line for Fourier transform infrared (FTIR) spectroscopy with simultaneous high time and frequency resolutions. Thanks to the rotational motion, the trade-off between speed and spectral resolution present in rapid-scan FTIRs is alleviated, and enables the use of high-brightness quantum cascade laser frequency combs as light sources. We demonstrate the capabilities of the delay line by resolving low-pressure methane absorption lines and tracking several absorption lines at video frame rates.

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关键词

high-resolution rotational Fourier-transform infrared spectroscopy,rotational optical delay line,time resolutions,frequency resolutions,rotational motion,high-brightness quantum cascade laser frequency combs,spectral resolution,light sources,low-pressure methane absorption lines,video frame rates

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