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POLARIZATION TRACKING SYSTEM FOR FREE-SPACE OPTICAL COMMUNICATION, INCLUDING QUANTUM COMMUNICATION
POLARIZATION TRACKING SYSTEM FOR FREE-SPACE OPTICAL COMMUNICATION, INCLUDING QUANTUM COMMUNICATION
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机译:用于自由空间光通信的极化跟踪系统,包括量子通信
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摘要
Quantum communication transmitters include beacon lasers that transmit a beacon optical signal in a predetermined state of polarization such as one of the states of polarization of a quantum communication basis. Changes in the beacon polarization are detected at a receiver, and a retarder is adjusted so that the states of polarization in a received quantum communication optical signal are matched to basis polarizations. The beacon and QC signals can be at different wavelengths so that the beacon does not interfere with detection and decoding of the QC optical signal.
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