Article Dans Une Revue IEEE Transactions on Terahertz Science and Technology Année : 2025

Terahertz Frequency Comb High-Resolution Heterodyne Spectrometer

Résumé

We demonstrate the advantages of THz frequency combs for high-resolution spectroscopy. This benefits from wide spectral coverage and the exact knowledge of the frequency position of each comb component. Heterodyne detection combined with a fast Fourier spectrometer enables rapid and simultaneous measurement of more than 80 frequency comb modes covering a 7.5 GHz bandwidth. A spectrum is obtained in under 20 minutes yielding a uniform resolution of 70 kHz. This new setup has been validated by recording more than 150 lines of methanol around 723 GHz, and represents a new solution to exploit THz frequency combs for high-resolution spectroscopy.

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Dates et versions

hal-04811272 , version 1 (29-11-2024)
hal-04811272 , version 2 (22-05-2025)

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Francis Hindle, Alexandra Khabbaz, Anthony Roucou, Jean-Francois Lampin, Gaël Mouret. Terahertz Frequency Comb High-Resolution Heterodyne Spectrometer. IEEE Transactions on Terahertz Science and Technology, 2025, 15 (4), ⟨10.1109/TTHZ.2025.3572249⟩. ⟨hal-04811272v2⟩
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