Terahertz Frequency Comb High-Resolution Heterodyne Spectrometer

IF 3.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-03-21 DOI:10.1109/TTHZ.2025.3572249

Francis Hindle;Alexandra Khabbaz;Anthony Roucou;Jean-François Lampin;Gaël Mouret

引用次数: 0

Abstract

We demonstrate the advantages of THz frequency combs (FCs) 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 FC modes covering a 7.5 GHz bandwidth. A spectrum is obtained in under 20 min 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 FCs for high-resolution spectroscopy.

查看原文本刊更多论文

太赫兹频率梳高分辨率外差光谱仪

我们展示了太赫兹频率梳（fc）在高分辨率光谱中的优势。这得益于广泛的频谱覆盖和每个梳组件频率位置的精确知识。外差检测与快速傅立叶光谱仪相结合，可以快速同时测量超过80种FC模式，覆盖7.5 GHz带宽。在20分钟内获得频谱，产生70 kHz的均匀分辨率。这个新装置已经通过记录超过150条723 GHz左右的甲醇谱线进行了验证，代表了一种利用太赫兹fc进行高分辨率光谱分析的新解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE Transactions on Terahertz Science and Technology ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

7.10

自引率

9.40%

发文量

102

期刊介绍： IEEE Transactions on Terahertz Science and Technology focuses on original research on Terahertz theory, techniques, and applications as they relate to components, devices, circuits, and systems involving the generation, transmission, and detection of Terahertz waves.