Direct-comb molecular spectroscopy with accurate, resolved comb teeth over 43 THz
Abstract
We demonstrate a dual-comb spectrometer using stabilized frequency combs spanning 177 to 220 THz (1360 to 1690 nm) in the near infrared. Comb-tooth-resolved measurements of amplitude and phase generate over 4×10(5) individually resolved spectral elements at 100 MHz point spacing and kilohertz-level resolution and accuracy. The signal-to-noise ratio is 100 to 3000 per comb tooth. Doppler-broadened phase and amplitude spectra of CO(2), CH(4), C(2)H(2), and H(2)O in a 30 m multipass cell agree with established spectral parameters, achieving high-resolution measurements with optical bandwidth generally associated with blackbody sources.
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Most ASOPS THz-TDS techniques use IFG, sum-frequency generation, or two-photon absorption of pulsed lasers as a trigger for signal accumulation.
“Most ASOPS THz-TDS techniques use IFG, sum-frequency generation, or twophoton absorption of pulsed lasers as a trigger for signal accumulation [3,11,12,18,31].”
From Jitter correction for asynchronous optical sampling terahertz spectroscopy using free-running pulsed lasers (2023) · cites this paper as [31]
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References 13 · Cited by 145
- Authors
- Zolot, A. M., Giorgetta, F. R., Baumann, E., Nicholson, J. W., Swann, W. C., Coddington, I., & Newbury, N. R.
- Affiliations
- National Institute of Standards and Technology (US)
- Venue
- Optics Letters
- Publisher
- The Optical Society
- Published
- 2012-02-10
- Volume
- 37
- Issue
- 4
- Pages
- 638
- ISSN
- 0146-9592 (ISSN-L)
- 1539-4794
- OpenAlex
- W2009882629
- Cited by
- 145
- References
- 13
- Citations by year
- 2026: 3 · 2025: 6 · 2024: 6 · 2023: 8 · 2022: 5 · 2021: 15 · 2020: 13 · 2019: 8 · 2018: 12 · 2017: 8 · 2016: 20 · 2015: 14 · 2014: 11 · 2013: 11 · 2012: 5
- FWCI
- 5.80
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Optics Letters (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Swiss National Science Foundation (SNSF) (PBNEP2-127797)
- 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
- dual-comb spectroscopy, frequency combs, comb teeth, high-resolution spectroscopy, Doppler broadening, carbon dioxide, methane, acetylene, water vapor, multi-pass cell, near-infrared spectroscopy
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