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Coherent dual-comb spectroscopy at high signal-to-noise ratio
Open accessAbstract
Two coherent frequency combs are used to measure the full complex response of a sample in a configuration analogous to a dispersive Fourier transform spectrometer, infrared time domain spectrometer, or a multiheterodyne laser spectrometer. This dual-comb spectrometer retains the frequency accuracy and resolution of the reference underlying the stabilized combs. We discuss the specific design of our coherent dual-comb spectrometer and demonstrate the potential of this technique by measuring the overtone vibration of hydrogen cyanide, centered at THz ( nm). We measure the fully normalized, complex response of the gas over a THz bandwidth at MHz frequency resolution yielding resolution elements. The average spectral signal-to-noise ratio (SNR) over the THz bandwidth is for both the magnitude and phase of the measured spectral response and the peak SNR is . This peak SNR corresponds to a fractional absorption sensitivity of and a phase sensitivity of microradians. As the spectral coverage of combs expands, coherent dual-comb spectroscopy could provide high-frequency accuracy and resolution measurements of a complex sample response across a range of spectral regions. Work of U. S. government, not subject to copyright.
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“The widths of the calculated absorption lines are 0.90, 0.85, and 0.91 GHz, respectively.”
From Jitter correction for asynchronous optical sampling terahertz spectroscopy using free-running pulsed lasers (2023) · cites this paper as [28]
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“The measured spectra and the database show good agreement in terms of both the absorption intensity and linewidth.”
From Jitter correction for asynchronous optical sampling terahertz spectroscopy using free-running pulsed lasers (2023) · cites this paper as [28]
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Metadata
- Authors
- Coddington, I., Swann, W., & Newbury, N.
- Affiliations
- National Institute of Standards and Technology (US)
- Venue
- Physical Review A
- Publisher
- American Physical Society (APS)
- Published
- 2010-10-12
- Volume
- 82
- Issue
- 4
- ISSN
- 0556-2791 (ISSN-L)
- 1050-2947
- 1094-1622
- OpenAlex
- W1998377056
- Cited by
- 322
- References
- 67
- Citations by year
- 2026: 8 · 2025: 20 · 2024: 24 · 2023: 32 · 2022: 16 · 2021: 23 · 2020: 16 · 2019: 22 · 2018: 38 · 2017: 17 · 2016: 33 · 2015: 20 · 2014: 20 · 2013: 8 · 2012: 11
- FWCI
- 4.85
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review A (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- 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
- frequency combs, signal-to-noise ratio, hydrogen cyanide, overtone vibrations, terahertz spectroscopy, phase sensitivity, absorption sensitivity, high frequency resolution
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