Terahertz Frequency Comb High-Resolution Heterodyne Spectrometer
Instrumentation and Detectors
2024-12-03 v1
Abstract
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.
Cite
@article{arxiv.2412.01308,
title = {Terahertz Frequency Comb High-Resolution Heterodyne Spectrometer},
author = {Francis Hindle and Alexandra Khabbaz and Anthony Roucou and Jean-Francois Lampin and Gaël Mouret},
journal= {arXiv preprint arXiv:2412.01308},
year = {2024}
}