High-energy femtosecond Yb-doped dispersion compensation free fiber laser
High-energy femtosecond Yb-doped dispersion compensation free fiber laser
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DOI：
10.1364/oe.15.010725
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发表时间：
2007-08-20
期刊：
影响因子：
3.8
通讯作者：
Hideur, Ammar
中科院分区：
文献类型：
--
作者：
Ortac, B.;Schmidt, O.;Hideur, Ammar
本文报道了一种工作在无色散补偿状态下的锁模高能光纤激光器。sigma腔由可饱和吸收镜和短长度大模面积光子晶体光纤构成。激光器产生能量为265 nJ的正啁啾脉冲，重复频率为10.18 MHz，工作稳定且自启动。脉冲可压缩至400fs，峰值功率为500kw。数值模拟准确地反映了实验结果，揭示了腔内脉冲自洽演化的机制。有了这种性能，锁模光纤激光器首次可以与最先进的体飞秒振荡器竞争，并且超过mu j级的脉冲能量缩放似乎是可行的。(c) 2007年美国光学学会
We report on a mode-locked high energy fiber laser operating in the dispersion compensation free regime. The sigma cavity is constructed with a saturable absorber mirror and short-length large-mode-area photonic crystal fiber. The laser generates positively-chirped pulses with an energy of 265 nJ at a repetition rate of 10.18 MHz in a stable and self-starting operation. The pulses are compressible down to 400 fs leading to a peak power of 500 kW. Numerical simulations accurately reflect the experimental results and reveal the mechanisms for self consistent intracavity pulse evolution. With this performance mode-locked fiber lasers can compete with state-of-the-art bulk femtosecond oscillators for the first time and pulse energy scaling beyond the mu J-level appears to be feasible. (c) 2007 Optical Society of America