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Proceedings Paper

Frequency characteristics of atmospheric turbulence in space-to-ground laser links
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Paper Abstract

Experiments involving laser communications between an optical ground station and a low earth orbit (LEO) satellite were successfully conducted from 2006 to 2009. The optical ground station is located in Koganei, Tokyo, and was developed by the National Institute of Information and Communications Technology (NICT), Japan. Four laser beams were transmitted from the optical ground station to the LEO satellite in order to reduce the intensity of the fluctuation of the optical signal caused by atmospheric turbulence. The frequency characteristics of the downlink are evaluated on the basis of theory and the measurements, where the sampling rate was 20 kHz. The speckle patterns were averaged and the frequency response of the received optical signal was filtered by the telescope aperture. The basis of the temporal aperture filtering function is derived and compared with the measured results.

Paper Details

Date Published: 4 May 2010
PDF: 12 pages
Proc. SPIE 7685, Atmospheric Propagation VII, 76850G (4 May 2010); doi: 10.1117/12.850149
Show Author Affiliations
Morio Toyoshima, National Institute of Information and Communications Technology (Japan)
Hideki Takenaka, National Institute of Information and Communications Technology (Japan)
Yozo Shoji, National Institute of Information and Communications Technology (Japan)
Yoshihisa Takayama, National Institute of Information and Communications Technology (Japan)


Published in SPIE Proceedings Vol. 7685:
Atmospheric Propagation VII
Linda M. Wasiczko Thomas; Earl J. Spillar, Editor(s)

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