Abstract:A space optical communication system with intensity modulation direct detection based on four quadrant detector tracking and communication multiplexing has been reported, which uses the dual optical wedge driven by ultrasonic motor as the beam deflection execution unit to form a closedloop system for beam position tracking. The rotation period of the driving motor is 15 ms, and the position resolution is 0. 83 μrad. Through theoretical analysis and experimental verification, the position closedloop tracking − … Show more
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