用于光纤激光器阵列锁相的光纤环特性研究  

Characteristics of Fiber Loop Applied to Phase Locking Array of Fiber Lasers

作　　者：雷兵[1] 冯莹[1] 魏立安[1] 刘泽金[1] 

机构地区：[1]国防科技大学光电科学与工程学院,湖南长沙410073

出　　处：《光学学报》2009年第9期2479-2485,共7页Acta Optica Sinica

基　　金：国防科技大学优秀研究生创新项目(B070702)资助课题

摘　　要：光纤环特性对基于公共光纤环的光纤激光器锁相阵列的性能具有重要影响。介绍了利用公共光纤环构建光纤激光器锁相阵列的结构、特征以及光纤环的作用。建立了研究该光纤环特性的理论模型,分别采用光强叠加和光场叠加法分析了光纤环的能量传输与谐振选模特性,并在考虑输入光波谱宽的情况下征明了两种方法的一致性。研究表明增加成环耦合器的耦合比可以增强锁相阵列各单元激光器间的能量耦合,且在光纤环损耗较低时不会明显降低输出功率和组合效率。实验中观察到了光纤环的滤波选模效应,而输出功率随着耦合比的增加有规律的略微减小,两者均与理论分析结果一致。The characteristics of fiber loop have important effect on the performance of the phase locking array of fiber lasers based on a common fiber loop. The configuration, properties of the array and the functions of the loop are introduced. The theoretical model of the loop is established, and its power transmission and resonance properties are analyzed by the intensity and amplitude addition methods respectively. It is proved that they are consistent when the line-width of input light-wave is considered. The research results indicate that increasing the fiber coupler＇s coupling ratio can increase the coupling strength among component lasers of the phase locking array, and the output power and combining efficiency will not decrease obviously if the loop＇s loss is low. The filtering effect of fiber loop is observed in experiment, and the output power decreases slightly and regularly with the increase of coupling ratio, which is consistent with the conclusions obtained from theoretical analysis.

关 键 词：光纤激光器 锁相 光强叠加法 光场叠加法 光纤环 光纤耦合器 

分 类 号：TN243[电子电信—物理电子学] TN253