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Applied Optics

Applied Optics


  • Vol. 21, Iss. 13 — Jul. 1, 1982
  • pp: 2381–2385

Application of upconversion detection to pulsed CO2 lidar

Toshikazu Itabe and Jack L. Bufton  »View Author Affiliations

Applied Optics, Vol. 21, Issue 13, pp. 2381-2385 (1982)

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In this paper the application of an upconversion detector to pulsed CO2 lidar is investigated. In this device a nonlinear IR crystal would be used to convert 10-μm lidar radiation into the visible region for conventional detection with a photomultiplier tube. A pulsed CO2 lidar can be substantially improved with an upconversion detector configured for rejection of thermal background radiation using a narrowband filter for the upconverted signal or a cold filter front end. The sensitivity of the upconversion detector with the narrowband visible wavelength filter is estimated to be 2 orders of magnitude better than that of the usual direct detection diode. The cold filter can improve upconversion detection to nearly the signal-shot limit. These upconversion detectors are not limited by speckle noise as is a pulsed heterodyne detector.

© 1982 Optical Society of America

Original Manuscript: November 24, 1981
Published: July 1, 1982

Toshikazu Itabe and Jack L. Bufton, "Application of upconversion detection to pulsed CO2 lidar," Appl. Opt. 21, 2381-2385 (1982)

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