Light and small athermalization quantum communication ground station telescope optical system

Abstract

The invention discloses a light and small athermalization quantum communication ground station telescope optical system which is composed of a primary mirror (1), a secondary mirror (2), an electric deflection reflector (3), a first beam splitter prism (4), a laser communication focus shrinkage mirror (5), a laser communication module (6), a second beam splitter prism (7), a precise tracking detector (8), a quantum communication collimating mirror (9) and a quantum communication module (10). The whole system comprises a primary mirror, a secondary mirror, a lens cone and other structural materials which are made of the same metal material and are made of aluminum alloy or beryllium aluminum alloy, the focal plane of each subsystem can coincide with a sensor without a temperature focusing mechanism when the environment temperature changes, and athermalization is achieved. Meanwhile, the primary mirror is made of a light metal material, an additional supporting structure is not needed, the relative aperture can be large, the cylinder length is shortened, and the weight is reduced. The whole optical system realizes laser communication and quantum communication at the same time throughthe mode. The optical system can be applied to a horizontal or polar axis type ground station telescope.

Description

technical field [0001] The invention belongs to the technical field of quantum laser communication, and in particular relates to an optical system of a quantum laser communication ground station telescope. Background technique [0002] Quantum key distribution 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. It is possible to achieve global coverage through space platform transit quantum communication network. As an indispensable link in the global quantum network, the ground station telescope can realize the capture and high-precision tracking of the beacon light emitted by the satellite communication terminal, complete the high-efficiency and high-degree-of-polarization reception of the quantum signal light on the star, and build a high-stable, Low-loss quantum channel...

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent 201410096430.8 published by the Institute of Optoelectronics Technology, Chinese Academy of Sciences proposes a quantum communication ground station telescope optical system, which can only receive quantum communication light and beacon light, and the ambient temperature change system cannot work, only through active axial movement The secondary mirror is temperature-adjusted, which increases the complexity of the system, reduces the reliability of the system, and increases the development cost

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