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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 27 — Sep. 20, 2007
  • pp: 6821–6830

Spatial distribution of doubly scattered polarized laser radiation in the focal plane of a lidar receiver

Vadim Griaznov, Igor Veselovskii, Paolo Di Girolamo, Michail Korenskii, and Donato Summa  »View Author Affiliations


Applied Optics, Vol. 46, Issue 27, pp. 6821-6830 (2007)
http://dx.doi.org/10.1364/AO.46.006821


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Abstract

Depolarization lidars are widely used to study clouds and aerosols because of their ability to discriminate between spherical particles and particles of irregular shape. Depolarization of cloud backscattered radiation can be caused also by multiple scattering events. One of the ways to gain information about particle parameters in the presence of strong multiple scattering is the measurement of radial and azimuthal dependence of the polarization patterns in the focal plane of receiver. We present an algorithm for the calculation of corresponding polarized patterns in the frame of double scattering approximation. Computations are performed for various receiver field of views, for different parameters of the scattering geometry, e.g., cloud base and sounding depth, as well as for different values of cloud particle size and refractive index. As the spatial distribution of cross-polarized radiation is of cross shape and rotated at 45° with respect to laser polarization, the use of a properly oriented cross-shaped mask in the receiver focal plane allows the removal of a significant portion of the depolarized component of the backscattered radiation produced by double scattering. This has been verified experimentally based on cloud depolarization measurements performed at different orientations of the cross-shaped mask. Results obtained from measurements are in agreement with model predictions.

© 2007 Optical Society of America

OCIS Codes
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.1100) Remote sensing and sensors : Aerosol detection
(280.3640) Remote sensing and sensors : Lidar
(290.4210) Scattering : Multiple scattering

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: January 30, 2007
Revised Manuscript: June 20, 2007
Manuscript Accepted: August 14, 2007
Published: September 19, 2007

Citation
Vadim Griaznov, Igor Veselovskii, Paolo Di Girolamo, Michail Korenskii, and Donato Summa, "Spatial distribution of doubly scattered polarized laser radiation in the focal plane of a lidar receiver," Appl. Opt. 46, 6821-6830 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-27-6821


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References

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