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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 20 — Jul. 10, 2006
  • pp: 4898–4908

Complementary study of differential absorption lidar optimization in direct and heterodyne detections

Didier Bruneau, Fabien Gibert, Pierre H. Flamant, and Jacques Pelon  »View Author Affiliations

Applied Optics, Vol. 45, Issue 20, pp. 4898-4908 (2006)

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A detailed study using both analytical and numerical calculations of direct and heterodyne differential absorption lidar (DIAL) techniques is conducted to complement previous studies. The DIAL measurement errors depend on key experimental parameters, some of which can be adjusted to minimize the statistical error. Accordingly, the pertinent criteria on optical thickness, the number of photons emitted at the on and off wavelengths, are discussed to reduce the relative error on the total column content or range-resolved measurements that rely on either hard target or atmospheric backscatter returns. In direct detection, the optimal optical thickness decreases from 1.3 to 0.8 when the background increases while the on-line-to-off-line optimal energy ratio decreases from 3.6 to 2.7. In heterodyne detection, the minimum error is obtained for an optical thickness of 1.2 and an energy ratio of 4.3.

© 2006 Optical Society of America

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(030.5290) Coherence and statistical optics : Photon statistics

Original Manuscript: December 20, 2005
Manuscript Accepted: February 1, 2006

Didier Bruneau, Fabien Gibert, Pierre H. Flamant, and Jacques Pelon, "Complementary study of differential absorption lidar optimization in direct and heterodyne detections," Appl. Opt. 45, 4898-4908 (2006)

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