Quantum communication precise tracking system

Abstract

The invention discloses a quantum communication precise tracking system. The quantum communication precise tracking system comprises a large-stroke deflection reflector, a beam shrinking unit, a small-stroke deflection reflector, a quantum communication receiving module, a first color separation filter, a second color separation filter, a first focusing lens, a precise tracking detector, a second focusing lens and a super-precise tracking detector. After quantum light enters the beam shrinking unit through transmission of the large-stroke deflection reflector, the beam diameter shrinks, and then the quantum light reaches the small-stroke deflection reflector, is reflected through high reflectance of the first color separation filter and then enters the quantum communication receiving module at the back end, and then quantum light coding and decoding are completed; after beacon light enters the beam shrinking unit through transmission of the large-stroke deflection reflector, the beam diameter shrinks, the beacon light reaches the small-stroke deflection reflector and is reflected through high reflectance of the first color separation filter, and after the beacon light is split by means of energy of the second color separation filter, one way of light reaches the fine precise tracking detector after being focused by the first focusing lens, and the other way of light reaches the super-precise tracking detector after being focused by the second focusing lens.

Description

technical field [0001] The invention belongs to the technical field of quantum communication, and specifically refers to a precise tracking system in which double deflection mirrors are connected in series and applied in a quantum communication system. Background technique [0002] Quantum communication is the closest practical direction in the field of quantum information. Free space quantum communication can use space platforms to establish high-stable and low-loss channels to realize ultra-long-distance quantum communication experiments. Through space platform transit, it is possible to realize quantum communication covering the whole world. The internet. To build a quantum communication system, it depends on a high-performance Acquisition, Tracking, Pointing (ATP) system. The task of the ATP system is to realize the capture and high-precision tracking of the beacon light emitted by the satellite communication terminal, to complete the high-efficiency and high-polarity-m...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of the prior art, the present invention proposes a quantum communication fine tracking system with double deflection mirrors connected in series to overcome the defects of low transmission efficiency of the existing fine tracking system and the inability to smoothly transition between capture and fine tracking. At the same time, the system The design can guarantee the polarization maintenance requirements of the entire communication link to the greatest extent

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