Patent ID: 6763196
Filing Date: 2004-07-13
Classification: H04B

Abstract:
A free space laser communication system comprising at least tow transceivers defining a first transceiver and a second transceiver, said first transceiver comprising:A) a beacon laser for transmitting a beacon laser beam at a first nominal wavelength to said second transceiver, B) a telescope, C) a steering mirror, D) a beam splitter, E) an imaging detector, F) a signal detector, G) a pickoff mirror mounted optically between said steering mirror and said beam splitter and blocking a portion of both signal light and beacon light received from said second transceiver, and H) a signal laser configured to transmit via said pickoff mirror and said steering mirror a signal beam at a second nominal wavelength through said telescope to said second transceiver; said steering mirror and said beam splitter being configured to direct to said imaging detector, beacon laser beams collected by said telescope from said second transceiver and to direct to said signal detector, signal laser beams collected by said telescope from said second transceiver, said steering mirror being dynamically positioned in response to feedback signals from said imaging detector, wherein said pickoff mirror blocks any single-scatter rays from said signal laser from reaching said imaging detector and said signal detector.