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Proceedings Paper

High bitrate free-space communicator using automatic nonlinear all-optical beam tracking
Author(s): Alexander E. Dudelzak; Alexander Sergeevich Kuzhelev; Daniel Gratton; Louis Hotte; Yoshinori Arimoto
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Paper Abstract

The paper presents the results of experimental study of an optical-beam tracking concept involving two systems based on different principles. One is all-optical tracking, which utilizes a nonlinear optical material providing automatic fine-tracking feature. Another is traditional opto-mechanical technology using a quadrant avalanche detector, a voice coil-mirror actuator, control electronics, and computer interface. The possibility of establishing automatic mutual tracking between two communicating parties without involving computer-aided beam addressing has been experimentally proven. Capabilities and limitations of both systems are described. The all-optical system performs better than the traditional one when it tracking laser beam angular disturbances of magnitude of a few mrad and the jitter frequency is high (≥100 Hz). The traditional opto-mechanical system shows higher efficiency at lower jitter frequencies. A combination of an all-optical fine-tracking module and an opto-mechanical coarse tracking module is suggested for applications where using our originally proposed all-optical approach for both coarse and fine beam steering / tracking would be less efficient.

Paper Details

Date Published: 18 April 2005
PDF: 9 pages
Proc. SPIE 5712, Free-Space Laser Communication Technologies XVII, (18 April 2005); doi: 10.1117/12.593779
Show Author Affiliations
Alexander E. Dudelzak, Canadian Space Agency (Canada)
Alexander Sergeevich Kuzhelev, Canadian Space Agency (Canada)
Daniel Gratton, Canadian Space Agency (Canada)
Louis Hotte, Canadian Space Agency (Canada)
Yoshinori Arimoto, National Institute of Information and Communications Technology (Japan)

Published in SPIE Proceedings Vol. 5712:
Free-Space Laser Communication Technologies XVII
G. Stephen Mecherle, Editor(s)

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