Optical free-space communication apparatus

Details Optical free-space communication apparatus Optical free-space communication apparatus

2005-11-22

2005-11-22

Pascal, Leslie (Department: 2633)

Optical communications

Optical communication over freee space

Satellite system

C398S129000, C398S131000

Reexamination Certificate

active

06968133

ABSTRACT:
An optical free-space communication apparatus includes a first light-emitting source for emitting a first transmission optical beam having a plane of polarization in a predetermined direction, the first transmission optical beam being modulated according to a primary signal containing communication information, a second light-emitting source for emitting a second transmission optical beam having a plane of polarization perpendicular to the plane of polarization of the first transmission optical beam, the second transmission optical beam being modulated according to an auxiliary signal for angle detection, a transmitting optical system for emitting the first and second transmission optical beams out of the apparatus as optical beams each having a predetermined angle of divergence, and a driving unit for redirecting the outgoing paths of the first and second transmission optical beams, wherein the second transmission optical beam has a larger angle of divergence than the first transmission optical beam.

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patent: 6347001 (2002-02-01), Arnold et al.

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