Single-photon ranging tracking and pointing and few-photon communication integrated receiving device and method

Abstract

The invention provides a single-photon distance measurement tracking and aiming and few-photon communication integrated receiving device and method, and the device comprises a single-photon detector, a fine aiming mechanism, and a terminal which comprises a distance measurement module, a communication module, and a fine aiming control module. The distance measuring module is used for demodulating the transmitting time of the transmitting optical signal and extracting the arrival time of the echo optical signal, and calculating the distance between the target transmitting end and the receiving end; the communication module is used for extracting communication information carried by photons in the echo optical signals and communicating with a target transmitting end; the fine aiming control module is used for acquiring distribution position differences of photons falling on the single-photon detector, and the fine aiming control module is in communication connection with the fine aiming mechanism. According to the receiving device, fine aiming, passive distance measurement and communication of a moving target are realized through the same single-photon detector, integration and miniaturization are improved, and high-precision tracking aiming, distance measurement and high-speed communication in an extreme scene are facilitated.

Description

technical field [0001] The present invention relates to the technical field of few-photon communication receivers, in particular to an integrated receiving device and method for single-photon ranging, tracking and aiming and few-photon communication. Background technique [0002] With the improvement of human aerospace technology and capabilities, the concept of deep space exploration will gradually develop. At the same time, for ultra-long-distance communication in deep space, the energy of the received echo light signal is extremely weak, usually only a few photon energies , even single photons. Single photon is no longer continuous light, and the energy of single photon is very small, and the photocurrent generated is lower than the noise of conventional photodetectors at room temperature. Therefore, special detection technology is required to detect this extremely weak echo light signal. In deep space communication, the signal transmission beam width of wireless laser c...

AI Technical Summary

Problems solved by technology

In deep space communication, the signal transmission beam width of wireless laser communication is narrow and the transmission distance is long. It is difficult to establish and maintain a laser link in a space environment. Therefore, it is necessary to establish a set of high-precision and high-reliability ranging And tracking system to prevent signal loss due to tracking accuracy

Since the tracking light signal uses a higher power beacon light for tracking and capture, and the communication light uses infrared communication light signals for high-speed communication. These two beams of light are usually optical signals of different bands, so as to distinguish tracking and communication. Therefore, the existing communication tracking system includes two detectors, which are used for tracking and communication respectively; moreover, the existing communication tracking system does not have the function of ranging. To achieve ranging, an additional detector is required To receive the optical signal of the transmitter for active ranging, so that the integration of the communication tracking system is low and the volume is increased

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