Accession Number:

ADA238896

Title:

Experimental Studies of Laser Beam Degradation by Turbulent Shear Layers

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Report Date:

1991-05-15

Pagination or Media Count:

18.0

Abstract:

The degradation of a laser beam by turbulent shear layers has been systematically and experimentally studied with variation in parameters. The near-field measurement results showed that the growth rates of the shear layers decreased drastically with increase in Mach number and were dependent, to a lesser extent, on the density ratio. The optical far-field measurements results showed that the Strehl ratio decreased with increase in refractive index change across the shear layers, with increase in growth, with increase in downstream distance of the nozzle exit, and with increase in beam diameter.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE