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

Dhiraj Kumar; Francesc Rocadenbosch

doi:10.1117/1.JRS.7.073591

31 January 2013 Determination of the overlap factor and its enhancement for medium-size tropospheric lidar systems: a ray-tracing approach

Dhiraj Kumar, Francesc Rocadenbosch

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 7, Issue 1, 073591 (January 2013). https://doi.org/10.1117/1.JRS.7.073591

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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Dhiraj Kumar and Francesc Rocadenbosch "Determination of the overlap factor and its enhancement for medium-size tropospheric lidar systems: a ray-tracing approach," Journal of Applied Remote Sensing 7(1), 073591 (31 January 2013). https://doi.org/10.1117/1.JRS.7.073591

Published: 31 January 2013

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