激光注入误差对多模光纤传能特性影响分析  

Effect of Injection Misalignment on Multimode Fiber Power Delivery Characteristics

作　　者：赵兴海[1] 高杨[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900

出　　处：《光子学报》2008年第9期1842-1847,共6页Acta Photonica Sinica

基　　金：国防预研项目(51305070402);中物院科学技术发展基金重点课题(2007A05001);中物院电子工程研究所科技创新基金(S20070202);总装引信基金(9140A05070208ZW0502)资助

摘　　要：采用ZEMAX软件对激光光纤注入系统进行了建模,仿真分析了激光注入光纤横向偏移、角度偏移对光纤传输激光能量特性的影响.结果表明,光纤输出激光能量分布与激光注入对准误差密切相关.注入误差引起光纤初始输入段激光峰值功率密度的剧烈波动,出现了一个激光峰值功率密度极大值,这个极大值是可以达到光纤截面内激光平均功率密度的数十倍;横向偏移激发大量斜光线产生,使光纤输出激光能量分布匀化;角度偏移仅影响光纤内子午光线与斜光线的传播方向,对光纤内激光能量分布的匀化作用较弱.The laser injection optics in multimode fiber transmission are simulated by ZAMAX,meanwhile, the effects of transverse and angular misalignments on fiber power delivery characteristics are anlysized. The results show that the output beam profile in such fibers is strongly dependent on the beam launching conditions at the input to the fiber. Injection misalignments induced consuming fluctuation of optical power density,a high-peak power density appeared at the initial ＂entry＂ segment of the fiber path,that is several ten times than the average power density. Transverse misalignment excitated a lot of screw rays, which can make the output laser power distribution more uniform. Angular misalignment only change the direction of meridian and screw rays propagation, and it has weak uniform effect on output laser power distribution.

关 键 词：光纤耦合 光纤传能 注入误差 能量分布 ZEMAX 

分 类 号：TN253[电子电信—物理电子学]