Determination of the overlap factor and its enhancement for medium-size tropospheric lidar systems: a ray-tracing approach
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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 sim- ulation software is presented. The method revisits both detector and fiber optics coupling alter- natives 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 meth- ods. 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, par- ticularly, in the near-range of the lidar
CitationKumar, D.; Rocadenbosch, F. Determination of the overlap factor and its enhancement for medium-size tropospheric lidar systems: a ray-tracing approach. "Journal of applied remote sensing", 31 Gener 2013, vol. 7, núm. 1, p. 073591-1-073591-14.