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Optics Letters

Optics Letters


  • Vol. 23, Iss. 13 — Jul. 1, 1998
  • pp: 1052–1054

Spectroscopic detection of methane by use of guided-wave diode-pumped difference-frequency generation

Konstantin P. Petrov, Andrew T. Ryan, Thomas L. Patterson, Lee Huang, Simon J. Field, and Douglas J. Bamford  »View Author Affiliations

Optics Letters, Vol. 23, Issue 13, pp. 1052-1054 (1998)

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We report spectroscopic gas detection by the use of mid-infrared difference-frequency mixing of two diode lasers in a channel waveguide. The waveguide was fabricated by annealed proton exchange in periodically poled lithium niobate. We generated 3.43–3.73-μm tunable radiation in a single waveguide at room temperature by mixing diode lasers near 780 and 1010 nm. High-resolution spectra of methane were obtained in 2 s with electronically controlled frequency scans of 45 GHz. The use of highly efficient waveguide frequency converters pumped by fiber-coupled diode lasers will permit construction of compact, solid-state, room-temperature mid-infrared sources for use in trace-gas detection.

© 1998 1998 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3730) Integrated optics : Lithium niobate
(190.2620) Nonlinear optics : Harmonic generation and mixing
(280.3420) Remote sensing and sensors : Laser sensors
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6390) Spectroscopy : Spectroscopy, molecular

Konstantin P. Petrov, Andrew T. Ryan, Thomas L. Patterson, Lee Huang, Simon J. Field, and Douglas J. Bamford, "Spectroscopic detection of methane by use of guided-wave diode-pumped difference-frequency generation," Opt. Lett. 23, 1052-1054 (1998)

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