FOCUSED LASER BEAMS IN TURBULENT MEDIA

Authors
  1. Bissonnette, L.R.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
A closed set of three simultaneous partial differential equations is derived for the solution of the average irradiance and the irradiance variance of focused laser beams in a turbulent medium. The equations are uniformly valid for arbitrary scintillation levels. Examples of solutions calculated by finite difference techniques agree very well with experimental data in the atmosphere and in the laboratory. An analytic expression for the turbulence-induced beam spreading is obtained and shown to be more precise than the commonly used formula based on the coherence diameter rho omicron. In the weak scintillation limit, the irradiance variance solution agrees with the classical perturbation results.
Report Number
DREV-4178/80 —
Date of publication
15 Dec 1980
Number of Pages
46
DSTKIM No
81-00157
CANDIS No
31333
Format(s):
Hardcopy;Originator's fiche received by DSIS

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