Accession Number:
AD0735935
Title:
Multiwavelength Laser Propagation Study
Descriptive Note:
Semiannual rept. Jul-Dec 1971
Corporate Author:
OREGON GRADUATE CENTER BEAVERTON
Personal Author(s):
Report Date:
1972-01-01
Pagination or Media Count:
88.0
Abstract:
During the reporting period, preliminary experiments were conducted on the nature and effects of fundamental intermittencies in atmospheric turbulence. These intermittencies affect scintillation levels, statistics, and experimental data spread, to a much greater degree than has been generally recognized. Following this, attention was given to transmitter aperture effects, and current experiments are pointing out serious deficiencies in certain theoretical predictions. As an example, the concept of a focused beam seems largely meaningless in turbulence, and predictions of sharp reductions in scintillations under such a condition are not borne out by photographic and electronic observations. Finally, a recent series of comprehensive multiwavelength scintillation experiments was incorporated into a paper, with the addition of new interpretative material.
Descriptors:
Subject Categories:
- Lasers and Masers
- Optics