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Proceedings Paper

Pulsed, tunable, single-frequency OP-GaAs OPO for the standoff detection of hazardous chemicals in the longwave infrared
Author(s): Q. Clément; J.-M. Melkonian; J.-B. Dherbecourt; M. Raybaut; A. Grisard; E. Lallier; B. Gérard; B. Faure; G. Souhaité; A. Godard
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Paper Abstract

We present our results on the first nanosecond single-frequency optical parametric oscillator (OPO) emitting in the longwave infrared. It is based on orientation-patterned GaAs (OP-GaAs), and can be pumped by a pulsed singlefrequency Tm:YAP microlaser thanks to its low oscillation threshold of 10 μJ. Stable single-longitudinal mode emission of the OPO is obtained owing to Vernier spectral filtering provided by its nested cavity OPO (NesCOPO) scheme. Crystal temperature tuning covers the 10.3-10.9 μm range with a single quasi-phase-matching period of 72.6 μm. Shortrange standoff detection of ammonia vapor around 10.4 μm is performed with this source. We believe that this achievement paves the way to differential absorption lidars in the LWIR with increased robustness and reduced footprint.

Paper Details

Date Published: 13 October 2015
PDF: 10 pages
Proc. SPIE 9649, Electro-Optical Remote Sensing, Photonic Technologies, and Applications IX, 964904 (13 October 2015); doi: 10.1117/12.2194771
Show Author Affiliations
Q. Clément, ONERA (France)
J.-M. Melkonian, ONERA (France)
J.-B. Dherbecourt, ONERA (France)
M. Raybaut, ONERA (France)
A. Grisard, Thales Research and Technology (France)
E. Lallier, Thales Research and Technology (France)
B. Gérard, III-V Lab. (France)
B. Faure, Teem Photonics S.A. (France)
G. Souhaité, Teem Photonics S.A. (France)
A. Godard, ONERA (France)

Published in SPIE Proceedings Vol. 9649:
Electro-Optical Remote Sensing, Photonic Technologies, and Applications IX
Gary Kamerman; Ove Steinvall; Keith L. Lewis; John D. Gonglewski, Editor(s)

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