基于啁啾光纤光栅的被动锁模掺Yb^(3+)激光器  

Passive Mode-Locked Yb^(3+)-Doped Laser Based on Chired Fiber Bragg Grating

作　　者：王兆坤[1,2] 杜松涛[1] 王子薇[1,2] 何晶[1,2] 周军[1] 

机构地区：[1]中国科学院上海光学精密机械研究所上海市全固态激光器与应用技术重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《中国激光》2014年第8期6-10,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(61308024);上海市自然科学基金(11ZR1441400);上海市青年科技启明星计划(12QH401100)

摘　　要：基于啁啾光纤布拉格光栅(C-FBG)与半导体可饱和吸收镜(SESAM)相结合实现了光纤掺Yb3+线型锁模激光器。采用976nm半导体激光器,以高掺杂浓度的掺Yb3+光纤作为增益介质,以SESAM作一端的反射镜,以C-FBG引入大的负色散,并作为另一端反射镜,最终获得了稳定皮秒脉冲序列的输出。其中心波长为1045nm,平均功率为12mW,基频重复频率为17.07MHz,脉宽约为3ps。详细讨论了高阶锁模光脉冲的演化方式。该锁模光纤激光器可以完全自启动,可以长时间稳定工作,有望成为高功率超短脉冲激光器的种子源。The passively mode-locked all fiber Yb3＋-doped linear laser based on the chirped fiber Bragg grating （C-FBG） combined with a semiconductor saturable absorber mirror （SESAM） is achieved. High doping concentration Yb3＋ -doped fiber is used as the gain medium, which is pumped by a 976 nm diode laser, with a SESAM as one end of the reflector. A C-FBG introduces a large anomalous dispersion, and operates as the other end of the reflector. Finally, a stable picosecond pulse sequence output is achieved with pulse duration of 3 ps at repetition rate of 17.07 MHz. The maximum average power is 12 mW with the center wavelength of 1045 nm. The evolution of higher-order mode-locked optical pulse is dicussed. The mode-locked fiber laser can be self-starting and has a longtime stability, and is expected to become seed sources for high-power ultrashort pulse laser.

关 键 词：激光器 光纤激光器 被动锁模 啁啾光纤布拉格光栅 半导体可饱和吸收镜 

分 类 号：TN248[电子电信—物理电子学]