用大模场光子晶体光纤获得高功率飞秒激光  

Large-Mode-Area Photonic Crystal Fiber Laser Output High Average Power Femtosecond Pulses

作　　者：王清月[1] 胡明列[1] 宋有建[1] 刘庆文[1] 刘博文[1] 张弛[1] 李毅[1] 柴路[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院超快激光研究室光电信息技术科学教育部重点实验室,天津300072

出　　处：《中国激光》2007年第12期1603-1606,共4页Chinese Journal of Lasers

基　　金：国家重点基础研究(2003CB314904;2006CB806002);国家高技术研究发展计划(2007AA03Z447);国家自然科学基金(60678012)资助项目

摘　　要：最近许多实验结果表明掺Yb光纤在提高输出功率方面还有很大潜力,而且由于大模面积光子晶体光纤的使用,飞秒光纤激光器的输出已经可以与传统飞秒固体激光器相比拟。报道了利用掺Yb的保偏型大模面积光子晶体光纤进行锁模和放大方面取得的实验结果,光子晶体光纤振荡级输出重复频率为51 MHz,脉冲宽度为450 fs,平均功率为2 W的飞秒激光,对应单脉冲能量40 nJ;同时利用国产双包层大模面积光纤进行了放大实验,在平均功率为毫瓦量级的种子光脉冲输入情况下,获得了103增益。Many experiments have proven the potential of power scaling of Yb-doped fibers when they are used in lasers and amplifiers. Recently, photonic crystal fibers have pushed the output parameters of femtosecond fiber laser to compare to the solid-state laser system. Our recently work on this field is presented in this paper. A mode-locking high energy photonic crystal fiber laser operating in the dispersion compensation free regime generates positivelychirped pulses with an average power 2 W of 51 MHz in a stable and self-starting operation. The energy of the pulse is up to 40 nJ and the pulse duration is 450 fs. A domestic Yb-doped double-cladding large-mode-area fiber was used for amplication experiment. With the milliwatt seed laser pulse inputting, 103 gain was obtained.

关 键 词：光纤光学 大模场面积光子晶体光纤 光纤激光器 光纤放大器 锁模 飞秒 

分 类 号：P437[天文地球—大气科学及气象学]