Laser Beam Degradation by an Inhomogeneous Free Jet Mixing Layer.

Abstract

A method for directly sampling and numerically processing the far field diffraction pattern of laser beams was developed. This method was used to examine the distortion effects of subsonic mixing layers with zero velocity ratio and various density ratios on beams passing through them. Details of the method are presented. Strehl ratios, indicating the amount of beam degradation, are derived from the data obtained from beams having passed through the mixing layers. The Strehl ratios derived from the data were found to match reasonably well with theoretical predictions.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1986
Accession Number
ADA171257

Entities

People

  • David B. Higgins

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Boundary Layer
  • Cameras
  • Diffraction
  • Far Field
  • Fluid Dynamics
  • Fluid Mechanics
  • Laser Beams
  • Lasers
  • Light Sources
  • Operating Systems
  • Optical Equipment
  • Optical Properties
  • Photographs
  • Refractive Index
  • Strehl Ratio
  • Three Dimensional
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Fluid Dynamics.
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy