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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 30 — Oct. 20, 2009
  • pp: 5696–5703

Mid-infrared ethene detection using difference frequency generation in a quasi-phase-matched Li Nb O 3 waveguide

Roberto Grilli, Luca Ciaffoni, Gus Hancock, Robert Peverall, Grant A.D. Ritchie, and Andrew J. Orr-Ewing  »View Author Affiliations


Applied Optics, Vol. 48, Issue 30, pp. 5696-5703 (2009)
http://dx.doi.org/10.1364/AO.48.005696


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Abstract

A periodically poled Li Nb O 3 (PPLN) crystal waveguide has been used to produce up to 200 μW of mid-infrared light around 3081 cm 1 with a wide tunability range of 35 cm 1 . Two commercial near-infrared diode lasers at 1.064 μm (pump) and 1.583 μm (signal) are mixed in a nonlinear optical crystal to achieve difference frequency generation. The 48 mm long directly-bonded quasi-phase-matched (QPM) PPLN waveguide shows a conversion efficiency of 12.3 % W 1 . Applications in trace gas detection have been demonstrated for ethene, using multipass absorption coupled with wavelength modulation spectroscopy, and cavity enhanced absorption spectroscopy with a lock-in detection scheme: bandwidth reduced sensitivities of α min = 8 × 10 9 and 1.6 × 10 8 cm 1 Hz 1 / 2 ( 2 σ ) , respectively, have been achieved.

© 2009 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(190.4360) Nonlinear optics : Nonlinear optics, devices
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.1030) Spectroscopy : Absorption
(300.6340) Spectroscopy : Spectroscopy, infrared
(190.4223) Nonlinear optics : Nonlinear wave mixing

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 21, 2009
Revised Manuscript: September 21, 2009
Manuscript Accepted: September 25, 2009
Published: October 13, 2009

Citation
Roberto Grilli, Luca Ciaffoni, Gus Hancock, Robert Peverall, Grant A.D. Ritchie, and Andrew J. Orr-Ewing, "Mid-infrared ethene detection using difference frequency generation in a quasi-phase-matched LiNbO3 waveguide," Appl. Opt. 48, 5696-5703 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-30-5696

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