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Massively parallel sensing of trace molecules and their isotopologues with broadband mid-IR frequency combs produced via optical subharmonic generation
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Paper Abstract

We present a new platform for mid-infrared (MIR) dual-comb spectroscopy, based on a pair of ultra-broadband subharmonic optical parametric oscillators (OPOs) pumped by two phase-locked thulium-fiber combs. Our system provides fast (7 ms for a single interferogram), moving-parts-free, simultaneous acquisition of 350,000 spectral data points, spaced by 115-MHz intermodal interval over 3.1–5.5 μm spectral range. Parallel detection of 22 trace molecular species in a gas mixture, including isotopologues containing such isotopes as 13C, 18O, 17O, 15N, 34S, 33S and 2H (deuterium), with part-per-billion sensitivity and sub-Doppler resolution has been demonstrated. We also show that by utilizing Kerr-lens mode-locked Cr:ZnS lasers operating at λ≈2.35 μm one can create MIR frequency combs spanning almost two octaves in wavelength.

Paper Details

Date Published: 14 May 2018
PDF: 5 pages
Proc. SPIE 10639, Micro- and Nanotechnology Sensors, Systems, and Applications X, 106392G (14 May 2018); doi: 10.1117/12.2303920
Show Author Affiliations
Konstantin L. Vodopyanov, CREOL, College of Optics and Photonics, Univ. of Central Florida (United States)
Andrey V. Muraviev, CREOL, College of Optics and Photonics, Univ. of Central Florida (United States)
Zachary Loparo, Univ. of Central Florida (United States)
Sergey Vasilyev, IPG Photonics - Mid-Infrared Lasers (United States)
Sergey B. Mirov, The Univ. of Alabama at Birmingham (United States)


Published in SPIE Proceedings Vol. 10639:
Micro- and Nanotechnology Sensors, Systems, and Applications X
Thomas George; Achyut K. Dutta; M. Saif Islam, Editor(s)

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