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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 13 — Jul. 1, 2007
  • pp: 1923–1925

Infrared frequency upconverter for high-sensitivity imaging of gas plumes

Masaharu Imaki and Takao Kobayashi  »View Author Affiliations


Optics Letters, Vol. 32, Issue 13, pp. 1923-1925 (2007)
http://dx.doi.org/10.1364/OL.32.001923


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Abstract

A remote methane detection system has been developed using a single-frequency tunable optical parametric oscillator at 3.4 μ m infrared wavelength. The infrared received light is converted by a frequency upconverter with a strong pump beam to near-infrared wavelength at 0.81 μ m and detected by a sensitive photomultiplier. The conversion efficiency of the upconverter was 40% for the backscatter signal from a topographic target, and the detector sensitivity was 11 times higher than that of the cooled InAs detector. By raster scanning the infrared beam, imaging was realized for the methane gas plume with an accuracy of 20 parts in 10 6 m at the range of 2 m .

© 2007 Optical Society of America

OCIS Codes
(040.3060) Detectors : Infrared
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.3420) Remote sensing and sensors : Laser sensors

ToC Category:
Remote sensing and sensors

History
Original Manuscript: February 5, 2007
Revised Manuscript: April 13, 2007
Manuscript Accepted: May 1, 2007
Published: June 25, 2007

Citation
Masaharu Imaki and Takao Kobayashi, "Infrared frequency upconverter for high-sensitivity imaging of gas plumes," Opt. Lett. 32, 1923-1925 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-13-1923


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