摘要
强度调制大气激光通信要求远场强度分布均匀平坦,而光强均匀度将会由于其空间相干性的退化而有所提高。实验研究了一种D形多模光纤的输出光场强度分布特性,比较了激光经圆柱形多模光纤和不经过光纤的输出光场强度分布,证明了采用D形多模光纤作为模式混合器,输出的光束具有相干度低和均匀性好的特性。
Intensity modulated atmospheric laser communication requires the uniform and flat far-field intensity distribution and intensity uniformity will be improved due to the degradation of its spatial coherence. An experimental study of a D-shaped multi-mode fiber output optical field intensity distribution characteristics is presented, compared with the output optical field intensity distribution from the laser through the cylindrical multi-mode optical fiber and not via an optical fiber. Experimental results show that using a D-shaped multi-mode fiber as the mode mixer, the output beam has a low degree of coherence and good uniformity.
出处
《激光与光电子学进展》
CSCD
北大核心
2013年第9期29-33,共5页
Laser & Optoelectronics Progress
关键词
光通信
D形光纤
远场分布
部分相干光
空间相干度
optical communications
D-shaped optical fiber
far-field distribution
partially coherent light
spatial coherence
