Cited by 734Spectroscopy and Laser ApplicationsAdvanced Fiber Laser TechnologiesLaser-Matter Interactions and Applications

Time-domain mid-infrared frequency-comb spectrometer

Keilmann, Fritz, Gohle, Christoph, Holzwarth, Ronald·2004·Optics Letters

Abstract

A novel type of Fourier-transform infrared spectrometer (FTIR) is demonstrated. It is based on two Ti:sapphire lasers emitting femtosecond pulse trains with slightly different repetition frequencies. Two mid-infrared beams-derived from those lasers by rectification in GaSe-are superimposed upon a detector to produce purely time-domain interferograms that encode the infrared spectrum. The advantages of this spectrometer compared with the common FTIR include ease of operation (no moving parts), speed of acquisition (100 micros demonstrated), and not-yet-shown collimated long-distance propagation, diffraction-limited microscopic probing, and electronically controllable chemometric factoring. Extending time-domain frequency-comb spectroscopy to lower (terahertz) or higher (visible, ultraviolet) frequencies should be feasible.

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Crossref · 10.1364/ol.29.001542

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9 of 9 references verified0 citation errors · 0 not checkable

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Authors
Keilmann, F., Gohle, C., & Holzwarth, R.
Affiliations
Max Planck Society (DE)
Venue
Optics Letters
Published
2004-07-01
Volume
29
Issue
13
Pages
1542
ISSN
  • 0146-9592 (ISSN-L)
  • 1539-4794
OpenAlex
W1979221508
Cited by
734
References
10
Citations by year
2026: 22 · 2025: 26 · 2024: 26 · 2023: 50 · 2022: 29 · 2021: 51 · 2020: 56 · 2019: 43 · 2018: 62 · 2017: 40 · 2016: 60 · 2015: 38 · 2014: 41 · 2013: 33 · 2012: 29
FWCI
4.75
Type
journal article
Language
en
Open access
closed
Locations
  • Optics Letters (publishedVersion)
  • PubMed (publishedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Fiber Laser Technologies
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
Keywords
time-domain interferometry, mid-infrared spectroscopy, Fourier transform infrared spectrometer, femtosecond pulse trains, Ti:sapphire laser, terahertz spectroscopy

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