Stroud, J.
and Plusquellic, D.
(2022),
Dual chirped-pulse electro-optical frequency comb method for simultaneous molecular spectroscopy and dynamics studies: formic acid in the terahertz region, Optics Letters, [online], https://doi.org/10.1364/OL.465823, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934761
(Accessed October 22, 2025)
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Dual chirped-pulse electro-optical frequency comb method for simultaneous molecular spectroscopy and dynamics studies: formic acid in the terahertz region
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Abstract
An electro-optic dual-comb system based on chirped-pulse waveforms is used to simultaneously acquire temporally magnified rapid passage signals and normal spectral line shapes from the back-transformation to the time domain. Multi-heterodyne terahertz (THz) wave generation and detection is performed with the difference frequency mixing of two free-running lasers. The method is used to obtain THz spectra of formic acid in the 10 cm-1 to 20 cm-1 (300 GHz-600 GHz) region over a range of pressures. The method is widely applicable across other spectral regions for investigations of the transient dynamics and spectroscopy of molecular systems.Citation
Optics Letters
Volume
47
Issue
15
Pub Type
Journals
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Keywords
electro-optic combs, dual comb, dual chirped pulse, rapid passage, THz region
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Created August 1, 2022, Updated May 9, 2023