Research Papers

Determination of the overlap factor and its enhancement for medium-size tropospheric lidar systems: a ray-tracing approach

[+] Author Affiliations
Dhiraj Kumar

Universitat Politècnica de Catalunya/Institut d’Estudi Espacials de Catalunya, Department of Signal Theory and Communications, Remote Sensing Laboratory, C/Jordi Girona 1-3, E-08034, Barcelona, Spain

Francesc Rocadenbosch

Universitat Politècnica de Catalunya/Institut d’Estudi Espacials de Catalunya, Department of Signal Theory and Communications, Remote Sensing Laboratory, C/Jordi Girona 1-3, E-08034, Barcelona, Spain

J. Appl. Remote Sens. 7(1), 073591 (Jan 31, 2013). doi:10.1117/1.JRS.7.073591
History: Received May 22, 2012; Revised December 27, 2012; Accepted January 18, 2013
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Abstract.  The problem of overlap factor (OVF) computation and its near-range sensitivity for medium-size aperture (f/10, f/11) bi-axial tropospheric lidar systems using ray-tracing simulation software is presented. The method revisits both detector and fiber optics coupling alternatives at the telescope focal-plane along with the insertion of a field lens. A sensitivity analysis is carried out as a function of laser divergence, field lens, and detector/fiber positions, detector size, and the fiber’s core diameter and numerical aperture. The ray-tracing approach presented here is straightforward and a comparatively much simpler solution than analytical-based methods. Parametric simulations are carried out to show that both approaches are coincident. Insertion of a field lens proves to be an elegant and low sensitivity solution for OVF enhancement, particularly, in the near-range of the lidar.

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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Dhiraj Kumar and Francesc Rocadenbosch
"Determination of the overlap factor and its enhancement for medium-size tropospheric lidar systems: a ray-tracing approach", J. Appl. Remote Sens. 7(1), 073591 (Jan 31, 2013). ; http://dx.doi.org/10.1117/1.JRS.7.073591


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