Accession Number:

ADA003340

Title:

Propagation of Multiwavelength Laser Radiation through Atmospheric Turbulence

Descriptive Note:

Final technical rept. 1 Dec 1973-1 Sep 1974

Corporate Author:

OREGON GRADUATE CENTER BEAVERTON

Report Date:

1974-11-01

Pagination or Media Count:

68.0

Abstract:

This report reviews progress on understanding the short-term statistics of microthermal turbulence fluctuations and opticalinfrared scintillations, and their interrelationship. A complete analytical understanding of microthermal and scintillation data-spread and confidence intervals has been achieved, including the effects of microthermal-envelope probability distributions, integral scales, varying averaging times, and turbulence intermittency. A practical definition and model of intermittent turbulence is given and it is shown that the usual mathematical techniques may be applied. As an addendum to the preceding report on this program, which deals with turbulence effects on finite aperture laser illumination systems, the effective aperture size of an arbitrarily truncated gaussian beam is derived.

Subject Categories:

  • Lasers and Masers
  • Infrared Detection and Detectors
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE