Optical Properties of Compressible Inhomogeneous Shear Layers Relevant to High Power Lasers.

Abstract

Shear layers and wakes are a major source of optical degradation in flow lasers. The structure of these flows has been studied experimentally with special attention given to their optical properties. Gases with different refractive indices were investigated and the effects of density ratio and mach number were measured. The time averaged optical properties of inhomogenious shear layers is reported here wherein the principle far field measurement was the strehl ratio. Modification of the apparatus of the shear is discussed. Keywords: Shear layers, Laser optical degradation, Refractive indices.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1987
Accession Number
ADA189299

Entities

People

  • Walter H. Christiansen

Organizations

  • University of Washington

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Fluid Dynamics
  • Fluid Mechanics
  • Gas Lasers
  • Laser Beams
  • Lasers
  • Light Sources
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Optical Properties
  • Refractive Index
  • Reynolds Number
  • Strehl Ratio
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Geotechnical Engineering.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy