Laser Beam Degradation by an Inhomogeneous Free Jet Mixing Layer.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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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.
- Lasers and Masers
- Fluid Mechanics