激光经D形多模光纤输出的光场特性实验研究  

Experimental Study of the Characteristics of the Light Field of the Laser Output Through the D-Shaped Multimode Fiber

作　　者：吴丽双[1] 

机构地区：[1]泉州师范学院物理与信息工程学院,福建泉州362000

出　　处：《激光与光电子学进展》2013年第9期29-33,共5页Laser & Optoelectronics Progress

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.

关 键 词：光通信 D形光纤 远场分布 部分相干光 空间相干度 

分 类 号：TN929.12[电子电信—通信与信息系统]