Mesures d'Irradiance et de Scintillation Laser à 3.7 μm pour Diverses Conditions Atmosphériques

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Authors
  1. Lepage, J-F.
  2. Vincent, D.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN)
Abstract
We carried out propagation measurements (over 545 m and 5.7 km paths) with a pulsed (12 ns) laser beam at a wavelength of 3.7 µm under various atmospheric conditions (sun, clouds, rain, snow). The objective was to evaluate the effects of atmospheric turbulence on the irradiance levels achievable on targets at these distances. Experimental results show that for all these conditions, the power distribution collected by an aperture is relatively well described by a log-normal probability distribution. Therefore, we can evaluate, considering a given scintillation value, the average power needed for the deposited power to exceed a threshold value with a specified probability.

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Report Number
DRDC-VALCARTIER-TR-2005-210 — Technical Report
Date of publication
01 Mar 2006
Number of Pages
114
DSTKIM No
CA026993
CANDIS No
524989
Format(s):
CD ROM

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