High-resolution spectroscopy with quantum cascade laser frequency combs

Markus Mangold, Pitt Allmendinger, Jakob Hayden, Florian Eigenmann, Olivier Browet, Muriel Lepère, Michele Gianella, Lukas Emmenegger, Andreas Hugi

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

Abstract

Optical frequency comb spectroscopy has proven an indispensable tool for high-resolution spectroscopy. QCL frequency combs offer the possibility to explore the mid-infrared spectral range. However, they suffer from large repetition frequencies which make them seemingly unsuitable for high resolution spectroscopy. We present three measurement modes overcoming this limitation. The rapid-sweep technique allows to retrieve the full high-resolution spectrum in 6ms, the step-sweep technique allows for high-resolution spectroscopy with spectral resolution <5e-4 cm-1. As a last technique we present the time-resolved step-sweep approach enabling high-resolution spectra of sub-millisecond-lived samples. It was assessed in a study of cold gases in supersonic beams.

Original languageEnglish
Title of host publicationQuantum Sensing and Nano Electronics and Photonics XVIII
EditorsManijeh Razeghi, Giti A. Khodaparast, Miriam S. Vitiello
PublisherSPIE
ISBN (Electronic)9781510648890
DOIs
Publication statusPublished - 2022
EventQuantum Sensing and Nano Electronics and Photonics XVIII 2022 - Virtual, Online
Duration: 20 Feb 202224 Feb 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12009
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceQuantum Sensing and Nano Electronics and Photonics XVIII 2022
CityVirtual, Online
Period20/02/2224/02/22

Keywords

  • Dual-frequency comb
  • High-resolution
  • QCL
  • Spectroscopy

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