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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 4 — Feb. 1, 2011
  • pp: A1–A10

Grating-cavity continuous-wave optical parametric oscillators for high-resolution mid-infrared spectroscopy

Markku Vainio, Mikael Siltanen, Jari Peltola, and Lauri Halonen  »View Author Affiliations

Applied Optics, Vol. 50, Issue 4, pp. A1-A10 (2011)

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The use of grating as a spectral filter provides a simple way of improving wavelength tuning and stability of continuous-wave optical parametric oscillators (cw OPOs). In this paper, we discuss how to design and use such grating-cavity cw OPOs for high-resolution spectroscopy in the molecular fingerprint region at 3 μm . The first design presented in the paper is based on a metal-coated diffraction grating, which produces fast and broad wavelength tuning and high wavelength stability. The second design uses a bulk Bragg grating for high optical power and good spectral purity. We report a new Bragg-grating OPO and demonstrate its use in a Doppler-free absorption spectroscopy of CH 4 at 3.22 μm . In addition, we describe a new balanced detection scheme, which can be used to improve the signal-to-noise ratio of absorption measurements if the measurement noise is limited by the intensity noise of the mid-infrared OPO.

© 2011 Optical Society of America

OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(140.3600) Lasers and laser optics : Lasers, tunable
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6390) Spectroscopy : Spectroscopy, molecular

ToC Category:

Original Manuscript: July 15, 2010
Manuscript Accepted: August 13, 2010
Published: September 13, 2010

Markku Vainio, Mikael Siltanen, Jari Peltola, and Lauri Halonen, "Grating-cavity continuous-wave optical parametric oscillators for high-resolution mid-infrared spectroscopy," Appl. Opt. 50, A1-A10 (2011)

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