【作者】 邓代竹；

【导师】 荣健；

【作者基本信息】 西南交通大学 ， 光学工程， 2004， 硕士

【摘要】 随着科学技术的发展与适合空间光通信应用的先进通信电子设备的研究技术基本成熟，无线激光通信又成为下一代光通信的发展方向之一。近地面无线光通信用于宽带接入，是解决最后“一英里”问题的有效方法；而在卫星通信系统中，卫星光通信被认为是解决卫星通信高码率“瓶颈”问题的唯一途径。由于大气激光通信采用的是大气随机信道，所以研究大气随机信道本身的特性对通信系统性能的影响非常重要。本文在搜集与查阅大量的相关文献资料，学习大气激光通信的相关原理后，研究了大气随机信道对无线激光通信的影响，对应大气激光通信的光信号的发射与接收。另外，本文还对大气折射对空地卫星光通信的影响做了研究，提出了利用修正光源的发射角来消除大气折射所引起的光束与卫星之间偏移的思想。这对实际的卫星通信系统具有重要的理论与实际意义。最后，通过实验对半导体激光通过大气传输的远场图样进行实时观测与记录，利用大气激光通信的简化模型对半导体激光通过大气传输的远场光斑做了MATLAB仿真，并在此基础上与实际的实验结果进行比较，利用实验结果对模型进行修正。还通过实验对典型天气条件下的大气衰减做了测量，从感性上认识大气衰减对无线激光通信的影响。更多还原

【Abstract】 Along with the development of the technology and the age of research of advanced communicate electronic facility adapt to space optical communication. Wireless optical communication again turn into one of developed aspect of the next generation. Wireless optical communication near to the earth using to meet Broad Band, it is available method to settle the "last mile" . And that satellite laser communication is considered the single way to solve the bottle-neck in the system of space communication. But in practical, it is very important to study the characteristic of atmospheric random channel. This paper introduce the effect of atmospheric random channel to wireless laser communication and light transmit and receive correspond to wireless optical communication after collect and refer to abundance literature information, learning correlated principle of atmospheric laser communication. In addition, we research atmospheric refraction influence to space-earth satellite communication, and put forward that amending emission angle can eliminate excursion between beam and satellite. This idea has emphasis theoretic and practical significance to practical system. At last, real time observation and note of far field pattern of semiconductor laser throughing atmospheric transmit by experiment. Simulating the predigest model using MATLAB and compared the result to experimental ones. Amending the model by experimental result. Also we measure atmospheric attenuation in typical weather and understand it effect to wireless optical communication by sensibility.更多还原