Gaussian distribution; Laser beams; Scattering; Computer programs; Laser speckle
An experimental and a theoretical analysis for a laser beam propagating through multiple phase screens was performed. The theoretical analysis showed that the statistics for the intensity fluctuations, which can be predicted by the HK and the I-K distributions, could be derived from a multiplicative process using statistical distributions derived from Gaussian statistics. For the single phase screen experiment, the experimental normalized moments were compared with the normalized moments of both the HK and I-K distributions . In addition, the intensity data was lowpass filtered to yield moments that are predicted by the gamma distribution. The single phase screen data was segmented into small time intervals, and all time segments with approximately the same variance were grouped together into bins to yield normalized moments for each bin that are predicted by the Rician distribution. Also, the normalized moments for two and three phase screen experiments were measured. Finally, a computer program was written to simulate K distributed noise from two independent Gaussian noise sources.
Phillips, Ronald L.
Doctor of Philosophy (Ph.D.)
College of Engineering
Length of Campus-only Access
Doctoral Dissertation (Open Access)
Weeks, Arthur R., "An Experimental and Theoretical Analysis of a Laser Beam Propagating Through Multiple Phase Screens" (1987). Retrospective Theses and Dissertations. 5147.