Research on Single Photon Laser Communication Detection and Receiving Technology Based on Baseband Pulse Sampling

To realize the efficient transmission of deep space communication, single photon detection technology is used to overcome the signal attenuation and noise problems in long-distance transmission. To further achieve high-speed single-photon communication, we proposed the pulse sampling on-off keying modulation method instead of the PPM to increase the rate, and introduced the dark counting of the single-photon detector system, and a single-photon detector simulation model is set up to solve the problem of the transmission of the non-return-to-zero code in the single-photon detector. Simulation results show that the pulse sampling technique solves the transmission problem of non-return-to-zero pseudo-random sequence code in a single-photon detector, and its bit error rate is lower than 10E-4 under the condition that the non-return-to-zero code cannot allow good communication. In addition, the relationship between the dark count rate and the bit error rate of a single photon detector is analyzed. Finally, the feasibility of applying pulse sampling to single-photon detector is proved by experiments. The research results are of great significance to the study of single-photon laser communication in deep space.