CAJ | 학술논문

基于大气的量子信道传输损耗低，不存在双折射效应，是量子通信实验的可行信道。通过建立卫星平台与光学地面站之间的高稳定低损耗量子信道，可实现超远距离的量子密钥分发。通过卫星中继，将有可能实现覆盖全球的量子通信网络，这也是目前国际公认的最为可行的方案之一。本文详细描述了1.2 m光学地面站望远镜的光学接收系统设计，望远镜采用R-C结构形式，具有近衍射极限的成像质量。为了抑制到达角起伏，实现微弧度级的跟踪精度，望远镜采用复合轴跟踪控制策略，可实现高精度和高带宽的跟踪。
기우대기적양자신도전수손모저，불존재쌍절사효응，시양자통신실험적가행신도。통과건립위성평태여광학지면참지간적고은정저손모양자신도，가실현초원거리적양자밀약분발。통과위성중계，장유가능실현복개전구적양자통신망락，저야시목전국제공인적최위가행적방안지일。본문상세묘술료1.2 m광학지면참망원경적광학접수계통설계，망원경채용R-C결구형식，구유근연사겁한적성상질량。위료억제도체각기복，실현미호도급적근종정도，망원경채용복합축근종공제책략，가실현고정도화고대관적근종。
Due to low absorption and negligible non-birefringent character in atmosphere, optical free space therefore serves as the most promising channel for large-scale quantum communication by use of satellites and optical ground stations. Quantum communication in space has become a new technological challenge in the evolving field of quantum communications. Its main goal is to achieve the distribution of single photons or entangled photon pairs from satellites to implement both quantum technologies such as quantum cryptography and fundamental quantum physics experiments. This article describes the equipment and features of the 1.2 m astronomical telescope which will perform experiments with quantum experiment satellite of China. The optical ground station uses 1.2 m gimbaled telescope to collect the photons, and the strategy of the system is slightly developed to meet the need of tracking LEO satellite, which has coarse and fine loop, and it can also control a transmitting and receiving laser beam within a few micro radians jitter. This telescope with multiple functions will play an important role in space-to-ground quantum communication.