作　　者： ; ; ; ; ;

机构地区： 天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室

出　　处： 《科学通报》 2009年第19期2944-2949,共6页

摘　　要： 从线性耦合的非线性薛定谔方程组出发,数值模拟了利用可饱和吸收镜启动多芯光子晶体光纤激光器锁模的建立过程.由于初始自发辐射的随机性,可饱和吸收镜在多个芯中提取的初始脉冲也具有很大的随机性.针对两种脉冲建立的可能初始情况,即只在一个纤芯中先提取出脉冲与同时在多个纤芯中提取出脉冲,对多芯光子晶体光纤作为锁模激光器增益介质的机理进行了详细的模拟.模拟结果表明,要想同时锁定多个纤芯的所有纵模频率,不仅需要纤芯之间具有较强的耦合,而且在可饱和吸收镜提取出的多个初始脉冲时延较大时,在Talbot腔结构下,端镜反射使得各个纤芯出射光束相互交叠也是建立稳定锁模过程必须的. Numerical analysis was performed on the mode locking forming procedure of a fiber laser in the linear cavity configuration. The fiber is a doped multi-core photonic crystal fiber. The SESAM is adopted as the nonlinear transmission element to start mode locking. Because of the noise randomness, initial pulse would be picked out by the SESAM in one or more cores which makes the multi-core mode locking quite different from single-core one. The two situations are compared and fully discussed. The mode locking in multi-core photonic crystal fiber laser can be realized only if the couple coefficient between the cores is large enough and the overlap between the beams in different cores is also necessary.

关 键 词： 光子晶体光纤 多芯 大模场面积 锁模

领　　域： [电子电信] [电子电信]