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Proceedings Paper

Experimental demonstration of a self-tracking 16-aperture receiver telescope array for laser intersatellite communications
Author(s): Andras Kalmar; Klaus H. Kudielka; Walter R. Leeb
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Paper Abstract

An adaptive receive telescope array with 16 apertures has been designed and breadboarded. With respect to size and performance, such a telescope array is well suited for use as receive antenna in a coherent interorbit laser link. The laboratory demonstrator, designed to operate at a wavelength of (lambda) equals 1.064 micrometers, is completely independent of any subsequent receiver and of the data modulation format employed. The telescope array is self-phasing, i.e. the main lobe of the antenna pattern automatically follows the direction of the incident wave. It thus performs non- mechanical fine tracking. Our experimental setup comprises a subtelescope array and a digital control unit employing digital signal processors. Besides inertia-free tracking, the control unit also checks and, if necessary, restores parallel alignment of the subtelescope axes at regular intervals. Space-worthy concepts have been applied wherever possible, although experiments have been performed only in the laboratory. Automatic fine-tracking is achieved within a single subtelescope's field of view (30 (mu) rad) in the frequency range up to 730 Hz.

Paper Details

Date Published: 27 May 1998
PDF: 9 pages
Proc. SPIE 3266, Free-Space Laser Communication Technologies X, (27 May 1998); doi: 10.1117/12.308695
Show Author Affiliations
Andras Kalmar, Technische Univ. Wien (Austria)
Klaus H. Kudielka, Technische Univ. Wien (Switzerland)
Walter R. Leeb, Technische Univ. Wien (Austria)

Published in SPIE Proceedings Vol. 3266:
Free-Space Laser Communication Technologies X
G. Stephen Mecherle, Editor(s)

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