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： 《物理学报》 2011年第6期335-339,共5页

摘　　要： 实验研究了基于掺Yb多芯大模场面积光子晶体光纤的全正色散锁模激光器.增益光纤的18个纤芯呈六角阵列排布,等效的模场直径约为52μm.激光器基于σ腔结构,腔内没有色散补偿元件,通过半导体可饱和吸收镜实现锁模的自启动.实验获得了平均功率为3.3W,脉冲宽度为4.92ps,重复频率为44.68MHz的锁模脉冲输出,对应的单脉冲能量为74nJ,脉冲经腔外光栅对压缩为780fs. A mode locked fiber laser based on Yb-doped large mode area photonic crystal fiber operating in the all-normal dispersion regime is experimentally studied.The eighteen cores of the gain fiber are arranged in array-type geometry with an equivalent mode diameter of about 52 μm.A sigma laser cavity is used without using any elements for dispersion compensation.Reliable self-starting mode-locking is achieved using a fast semiconductor saturable absorber mirror.The laser directly produces 4.92 ps chirped pulses at a 44.68 MHz repetition rate for an average power of 3.3 W corresponding to a pulse energy of 74 nJ.The pulses are compressed to 780 fs with a grating pair outside the cavity.

关 键 词： 光子晶体光纤 多芯 光纤激光器 全正色散

领　　域： [电子电信]