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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 19 — Jul. 1, 2005
  • pp: 4123–4129

Widely tunable continuous-wave mid-infrared radiation (5.5–11 µm) by difference-frequency generation in LiInS2 crystal

Weidong Chen, Emmanuelle Poullet, Jean Burie, Daniel Boucher, Markus W. Sigrist, Jean-Jacques Zondy, Ludmila Isaenko, Alexander Yèlisseyev, and Sergei Lobanov  »View Author Affiliations


Applied Optics, Vol. 44, Issue 19, pp. 4123-4129 (2005)
http://dx.doi.org/10.1364/AO.44.004123


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Abstract

The first demonstration, to the best of our knowledge, of continuous-wave (cw) difference-frequency generation (DFG) in LiInS2 crystal is reported. Wide spectral coverage (5.5–11.3 µm) has been obtained with angle and wavelength tuning for type II (eoe) critically phase-matched parametric interaction. The phase-matching conditions in cw DFG have been investigated, which allowed us to improve the Sellmeier parameters by use of a two-pole dispersion equation. An effective nonlinear coefficient deff = 6.9 ± 0.8 pm/V has been determined at ∼7 µm relative to the well-known nonlinear coefficient d36 of AgGaS2, which yields a power-conversion efficiency of ∼12.4 µW/(W2 cm). We evaluated the high-resolution spectral characteristics of the DFG source by recording C2H2 and SO2 spectra.

© 2005 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6360) Spectroscopy : Spectroscopy, laser

History
Original Manuscript: November 29, 2004
Manuscript Accepted: January 21, 2005
Published: July 1, 2005

Citation
Weidong Chen, Emmanuelle Poullet, Jean Burie, Daniel Boucher, Markus W. Sigrist, Jean-Jacques Zondy, Ludmila Isaenko, Alexander Yèlisseyev, and Sergei Lobanov, "Widely tunable continuous-wave mid-infrared radiation (5.5–11 µm) by difference-frequency generation in LiInS2 crystal," Appl. Opt. 44, 4123-4129 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-19-4123

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