Mid-infrared dual-comb spectroscopy with electro-optic modulators

Light, Science & Applications
Ming YanN Picqué

Abstract

Absorption spectroscopy of fundamental ro-vibrational transitions in the mid-infrared region provides a powerful tool for studying the structure and dynamics of molecules in the gas phase and for sensitive and quantitative gas sensing. Laser frequency combs permit novel approaches to perform broadband molecular spectroscopy. Multiplex dual-comb spectroscopy without moving parts can achieve particularly high speed, sensitivity and resolution. However, achieving Doppler-limited resolution in the mid-infrared still requires overcoming instrumental challenges. Here we demonstrate a new approach based on difference-frequency generation of frequency-agile near-infrared frequency combs that are produced using electro-optic modulators. The combs have a remarkably flat intensity distribution, and their positions and line spacings can be freely selected by simply dialing a knob. Using the proposed technique, we record, in the 3-μm region, Doppler-limited absorption spectra with resolved comb lines within milliseconds, and precise molecular line parameters are retrieved. Our technique holds promise for fast and sensitive time-resolved studies of, for example, trace gases.

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Citations

May 16, 2018·Nature Communications·Mengjie YuAlexander L Gaeta
Aug 14, 2019·Physical Chemistry Chemical Physics : PCCP·Pei-Ling LuoYu-Chan Guan
Dec 24, 2019·Applied Spectroscopy·Urszula SzczepaniakMarkus Geiser
Mar 29, 2020·Light, Science & Applications·Xing-Long ZhuJie Zhang
Aug 30, 2019·Optics Letters·Philippe GuayJérôme Genest
Nov 1, 2017·Optics Letters·Mengjie YuAlexander L Gaeta
Feb 14, 2019·Proceedings of the National Academy of Sciences of the United States of America·Zaijun ChenNathalie Picqué
May 15, 2020·Optics Express·Gabriel YcasIan Coddington
Jul 8, 2020·Optics Letters·Abijith S KowligyScott A Diddams
Oct 2, 2020·Optics Letters·Farid Ullah KhanPedro Martín-Mateos
Mar 8, 2018·Science Advances·Avik DuttMichal Lipson
Feb 15, 2020·Scientific Reports·Riccardo GottiMarco Marangoni
Mar 17, 2019·Optics Express·Xiaoyu ZhaiHanzhong Wu
Mar 21, 2021·Light, Science & Applications·Xing-Long ZhuJie Zhang
Aug 14, 2021·Optics Letters·Jeong Hyun HuhNathalie Picqué
Nov 14, 2021·Nature Communications·Chengying BaoKerry J Vahala
Nov 5, 2021··Kamal HammaniAlexandre Parriaux
Jan 13, 2021··Nathalie Picqué

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