Numerical analysis of mode locking in multi-core photonic crystal fiber  

作　　者：FANG XiaoHui HU MingLie LI YanFeng CHAI Lu WANG QingYue 

机构地区：[1]Ultrafast Laser Laboratory, Key Laboratory of Optoelectronic Information Science and Technology of Ministry of Education, College of Preci-sion Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China

出　　处：《Chinese Science Bulletin》2010年第18期1864-1869,共6页

基　　金：supported by National Basic Research Program of China (2006CB806002 and 2010CB327604);the National Natural Science Foundation of China (60838004 and 60978022);the Key Project of Chi-nese Ministry of Education (108032);the Foundation for the Author of National Excellent Doctoral Dissertation of China (2007B34);the Program for New Century Excellent Talents in University (NCET-07-0597)

摘　　要：With linearly coupled nonlinear Schrodinger equations,numerical analysis has been performed on the mode locking forming procedure of a fiber laser in the linear cavity configuration.The fiber is Yb-doped multi-core photonic crystal fiber and semiconductor saturable absorber mirror(SESAM) is adopted as the nonlinear transmission element to start mode locking.Because of the noise randomness,initial pulse would be picked out by 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.Mode locking in multi-core photonic crystal fiber laser can be realized only if the couple coefficient between the cores and the temporal overlap between the pulses in different cores are large enough.With linearly coupled nonlinear Schrodinger equations, numerical analysis has been performed on the mode locking forming pro- cedure of a fiber laser in the linear cavity configuration. The fiber is Yb-doped multi-core photonic crystal fiber and semiconduc- tor saturable absorber mirror （SESAM） is adopted as the nonlinear transmission element to start mode locking. Because of the noise randomness, initial pulse would be picked out by 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. Mode locking in multi-core photonic crystal fiber laser can be realized only if the couple coefficient between the cores and the temporal overlap between the pulses in different cores are large enough.

关 键 词：光子晶体光纤激光器 模式锁定 数值分析 耦合非线性薛定谔方程 多芯 光子晶体纤维 非线性传输 可饱和吸收 

分 类 号：TN253[电子电信—物理电子学]