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Proceedings Paper

Massively-parallel intracavity trace molecular detection in the mid-infrared using broadband frequency combs
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Paper Abstract

Ultrasensitive detection of methane, isotopic carbon dioxide, carbon monoxide, formaldehyde, acetylene and ethylene is performed in the spectral range 2.5 - 5 μm using intracavity spectroscopy inside a broadband optical parametric oscillator (OPO). The two separate OPOs were operated near degeneracy and were synchronously pumped either by a mode-locked erbium (1560 nm) or thulium (2050 nm) fiber laser. A large instantaneous bandwidth of up to 800 cm-1 allowed for simultaneous detection of several gases. We observed an effective path length enhancement due to coherent interaction inside the OPO cavity and achieve part-per-billion sensitivity levels.

Paper Details

Date Published: 31 January 2014
PDF: 8 pages
Proc. SPIE 8993, Quantum Sensing and Nanophotonic Devices XI, 899303 (31 January 2014); doi: 10.1117/12.2030443
Show Author Affiliations
Konstantin Vodopyanov, CREOL, College of Optics and Photonics, Univ. of Central Florida (United States)

Published in SPIE Proceedings Vol. 8993:
Quantum Sensing and Nanophotonic Devices XI
Manijeh Razeghi; Eric Tournié; Gail J. Brown, Editor(s)

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