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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 11, Iss. 22 — Nov. 3, 2003
  • pp: 2820–2825

Transportable, highly sensitive photoacoustic spectrometer based on a continuous-wave dualcavity optical parametric oscillator

Frank Müller, Alexander Popp, Frank Kühnemann, and Stephan Schiller  »View Author Affiliations

Optics Express, Vol. 11, Issue 22, pp. 2820-2825 (2003)

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We present an all solid state, transportable photoacoustic spectrometer for highly sensitive mid-infrared trace gas detection. A complete spectral coverage between 3.1 and 3.9 µm is obtained using a PPLN-based continuous-wave optical parametric oscillator pumped by a Nd:YAG laser at 1064 nm. A low threshold is achieved by resonating the pump, and spectral agility by employing a dual-cavity setup. An etalon suppresses mode-hops. Active signal cavity stabilization yields a frequency stability better than ±30 MHz over 45 minutes. Output idler power is 2×100 mW. The frequency tuning qualities of the OPO allow reliable scan over gas absorption structures. A detection limit of 110 ppt for ethane is achieved.

© 2003 Optical Society of America

OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Research Papers

Original Manuscript: September 17, 2003
Revised Manuscript: October 17, 2003
Published: November 3, 2003

Frank Müller, Alexander Popp, Frank Kühnemann, and Stephan Schiller, "Transportable, highly sensitive photoacoustic spectrometer based on a continuous-wave dualcavity optical parametric oscillator," Opt. Express 11, 2820-2825 (2003)

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