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- W2028543692 abstract "ABSTRACT So-called free-space laser communication systems working near the surface of the Earth must operate in thepresence of atmospheric turbulence. The eects of the atmospheric turbulence on the laser beam which arerelevant to optical communications are a broadening of the laser footprint, random jitter of the laser beam, andhigh spatial frequency intensity uctuations referre d to as scintillation. The overall goal of our program is toimprove performance and extend the range of optical communications systems by exploring the use of adaptiveoptics and channel coding. To better model the performance of a real system operating in the real world, we havedeveloped an outdoor turbulence-measurement and monitoring system. In this paper we describe an atmosphericturbulence monitoring system for three kilometers, partially over water path. The laser transmitter operatesat 808 nm with a source power of 2mW. The receiver consists of relay opti cs, a Hartmann wave front sensor(WFS), and a CCD camera. The WFS is used to monitor atmospheric turbulence-induced phase aberrations,and the camera is used for both conventional imaging studies and measurements of anisoplanatic eects. In thispaper we describe this system and present some pre liminary results obtained from the measurements.Keywords: laser communication channel, turbulence, scintillation, adaptive optics" @default.
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- W2028543692 date "2009-05-01" @default.
- W2028543692 modified "2023-09-22" @default.
- W2028543692 title "An atmospheric turbulence, scattering, and weather monitoring system for three kilometers, partially over water path for monitoring the statistics of turbulence" @default.
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- W2028543692 doi "https://doi.org/10.1117/12.821664" @default.
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