摘要
大气湍流使光载波的强度和相位在空间和时间上都呈现随机起伏,从而极大地降低了激光通信系统的性能。基于大气湍流信道的特点,分析了各种湍流效应对大气激光通信系统性能的影响,介绍了自适应光学相位补偿技术在大气激光通信系统中的应用进展,特别指出基于随机并行梯度下降(SPGD)算法的自适应光学技术由于具有诸多优点,在未来的大气激光通信系统中可能有较为广阔的应用前景。
Atmospheric turbulence makes phase and intensity of the optical carrier wave occurring random variations at spatial and temporal scale, so that the performance of the laser communication system is severely degraded. Based on characterizations of atmospheric turbulence channel, various turbulence effects on perfor- mance of atmospheric laser communications system are analyzed. Then adaptive optics compensation technology for the atmospheric channel and its effect on the performance of atmospheric laser communication are introduced. Especially, it is pointed out that the stochastic parallel gradient descent （SPGD） algorithm is a promising control algorithm for the future application of adaptive optics to atmospheric laser communication due to having several advantages.
出处
《光通信技术》
CSCD
北大核心
2008年第7期58-61,共4页
Optical Communication Technology
关键词
大气激光通信
大气湍流
自适应光学
误码率
atmospheric laser communication
atmospheric turbulence
adaptive optics
bit-error rate
