Design of an optical ground station for in-orbit checkout of free-space laser communication payloads

Research Progress on Overcoming the Atmospheric Turbulence Effect in Satellite-to-Ground Laser Communication

“…式中 v W (z) 代表风速。 图 1 是 ESA 在西班牙特纳利夫岛光学地面站接收光信号的自适应光学(OGS)接收装置 [28] 的基本原理结 构图， 信号光进入该结构前需要通过快反镜(FSM)和控制环结构消除信号光在接收端到达角的波动。其中， 望远镜由两个共焦的 4F 透镜组构成， 入瞳位于图 1 中的可变形镜(DM)处， 出瞳位于由透镜阵列组成的哈特 曼 (S-H)波 前 传 感 器 [29]…”

Deep-Space Optical Communications: Future Perspectives and Applications

“…1 show optical links between spacecraft at these destinations and ground-based Earth stations. Approximately 1-2-m diameter ground telescopes are needed to receive the high-rate downlink from these distances [12], [19]- [21]. Near-Earth links use a laser beacon transmitted from the intended target receiver as a reference for acquisition, tracking, and pointing.…”

“…A number of optical ground stations for servicing these links exist around the world today. They are: 1) NASA's Optical Communication Telescope Laboratory (OCTL) at Table Mountain, CA [68]; 2) NICT (Japan's) Optical Ground Station [12] in Kognei; and 3) ESA's operated Optical Ground Station [19] at Tenerife, Canary Island, Spain. We will focus the present discussion on the deep-space ground subsystem and describe the receiver and transmitter separately.…”

Performance analysis of pupil-matching optical differential receivers in space-to-ground laser communication

“…Laser communication systems are used for ultrahigh-data-rate satellite-to-ground communication networks [1][2][3] because of more advantages over microwave communications. However, atmosphere turbulence deteriorates the wavefront [4,5] of the signal light and the integrality of the optical phase, seriously decreases the heterodyne efficiency, and increases the bit error ratio (BER) of the optical receiver.…”

“…We define the optical field of the incident light with DPSK modulation as U T x; y; t 0 A T x; y; t 0 expjφt 0 θ 0 ; (1) where φt 0 is the time-varying phase information, θ 0 is a phase constant, and A T x; y; t 0 is the amplitude of the incident light. The relation between the differential phase Δφt i and data information is expressed as Fig.…”