【作者】 王萍萍；

【导师】 艾勇；

【作者基本信息】 武汉大学 ， 物理电子学， 2004， 硕士

【摘要】 信息产业已成为当今世界上最强劲的高科技增长点和经济社会的支柱，激光通信技术正以难以想象的速度将世界带入高速发展的信息时代。而空间光通信作为激光通信发展的一个重要分支，在星际间通信、近地无线互连、无线宽带接入、应急通信等方面都有着广阔的应用前景。随着对超稳激光器、新型光束控制器、高灵敏度和高数据率接收器以及适合空间应用的先进通信电子设备的研究基本成熟，空间光通信已成为下一代光通信的主要发展方向之一。 本文对基于空间光通信的光波分复用技术作了全面介绍，并详细分析了美国Lucent公司推出的4×2.5 Gb／s 4.4km WDM大气光通信系统及40 Gb／s 4.4kin DWDM大气光通信系统。从激光发射、信号接收以及光学系统等方面深入研究了空间光通信系统结构，采用MAXIM公司的集成芯片MAX4106、MAX435、MAX436以及MAX9691设计了光电接收电路，进行了系统功率容限计算及影响通信距离的各因素分析。针对地面空间光通信所面临的激光大气传输问题，依据衍射理论，推导了激光在大气湍流折射率场起伏影响下的光强分布，并利用MATLAB进行了光斑模拟。最后进行了双波长无线光通信实验，结果表明波分复用技术用于空间光通信是完全可行的，在扩大通信容量方面有极强的优势。更多还原

【Abstract】 Nowadays information industry has become one of the most driving high technique grew-up points and the supports of economic society. The technology of laser communication is bringing the world into the information times with incogitability speed. As an important embranchment of laser communication, space optical communication can be applied widely such as the communication between satellites, wireless interconnection, wireless broadband access, emergency communication. Along with maturity of the technologies including exceedingly stable laser diode, new type of controller of light beam, high sensitivity and high speed receiver and advanced communication device, space optical communication has become one of the main developing directions of laser communication of next generation.In this thesis,WDM technology based on space optical communication is entirely introduced and 4 X 2.5Gb/s 4.4km WDM atmospheric laser communication system and 40Gb/s 4.4km DWDM atmospheric laser communication system are analyzed in detail. The structure of space optical communication system is deep studied from the aspects including laser transmission, signal receive and optical system. Adopting MAX4106, MAX435, MAX436 and MAX9691 chips of MAXIM company designs photoelectric receive circuit. Furthermore the tolerable limit of system power is calculated and the factors that affect the communication distance are analyzed. Aiming at the difficulties of laser transmission in atmosphere that space optical communication is facing and according to diffraction theory, the distribution of light intensity, which is affected by the fluctuation of refractive index field of the atmospheric turbulence, is deduced and simulated by MATLAB. finally, the experiment of double wavelenghs wireless optical communication is carried through. The results show that applying WDM technology to space optical communication is completely feasible and can enlarge communication capacity consumedly.更多还原