A light and small athermalized quantum communication ground station telescope optical system

Abstract

The invention discloses a light and small athermal quantum communication ground station telescope optical system, which consists of a primary mirror (1), a secondary mirror (2), an electric deflection mirror (3), a beam splitting prism (4), a laser communication A focal lens (5), a laser communication module (6), a beam splitting prism two (7), a fine tracking detector (8), a quantum communication collimator (9) and a quantum communication module (10) are composed. The whole system, including the main mirror, secondary mirror and lens barrel, is made of the same metal material, which is aluminum alloy or beryllium aluminum alloy. The focal plane of each subsystem can coincide with the sensor without the need for a temperature-adjusting mechanism when the ambient temperature changes. heating. At the same time, the primary mirror is made of lightweight metal material, without additional support structures, and can achieve a large relative aperture, thereby shortening the tube length and reducing weight. The entire optical system simultaneously realizes laser communication and quantum communication through the above-mentioned method. The optical system can be applied in horizon-type or polar-axis ground station telescopes.

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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