| Citation: | GAO Zi-yi, SHENG Ya-pei, DONG Jiao, LIN Peng, XU Li, YU Xiao-nan, DONG Ke-yan. Research on key technologies of broadband reconfigurable single-photon laser communication transceivers[J]. Chinese Optics. doi: 10.37188/CO.2025-0145
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Single-photon detectors (SPDs) exhibit high sensitivity and strong anti-interference capability, and are often integrated with the traditional pulse position modulation (PPM) technique for long-distance laser communication. However, this integration suffers from low communication rates. To address the rate performance limitations of PPM modulation, a broadband reconfigurable pulse sampling data transmission scheme based on single-photon detectors is proposed. In addition, an adaptive pulse-width algorithm tailored to this modulation method is designed to achieve optimal pulse-width selection for the data acquired by single-photon detectors. At the transmitter, the FPGA GTX high-speed transceiver and real-time serial port transceiving are adopted to optimize the transmitted code pattern; at the receiver, a bit error rate (BER) monitoring and adaptive algorithm module is developed. Link simulations and adaptive simulations are conducted to evaluate the impacts of actual channel scenarios, and a
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