Propagation of Multiwavelength Laser Radiation through Atmospheric Turbulence
Interim rept. 1 Apr 1975-31 Jul 1975
OREGON GRADUATE CENTER BEAVERTON
Pagination or Media Count:
Recent activity on several topics in propagation through atmospheric turbulence is described in this report. The statistics of target or receiver irradiance, conditioned on a prior measurement of the instantaneous value, are considered under conditions of moderately strong fluctuations, and it is found experimentally that such scintillations are not described by a bivariate log normal distribution. A study of computer simulation techniques is described which has the goal of making possible realistic models of propagation paths for the short-term, time-dependent statistics of scintillation, including the effects of localized or intermittent strength of turbulence. The important future topic on this program will be the experimental and analytical determination of scintillations from laser-illuminated diffuse and general targets. A preliminary analysis of scintillations from a diffuse target is given, which is valid in the near field of the target illumination area.
- Lasers and Masers