CNRS UMR 6614 CORIA, Université de Rouen, Avenue de l’Université, BP 12, 76801 Saint Etienne du Rouvray, France.
Opt Lett. 2010 Oct 1;35(19):3156-8. doi: 10.1364/OL.35.003156.
We report the generation of high-energy high-peak power pulses in an all-normal dispersion fiber laser featuring large-mode-area photonic crystal fibers. The self-starting chirped-pulse fiber oscillator delivers 11 W of average power at 15.5 MHz repetition rate, resulting in 710 nJ of pulse energy. The output pulses are dechirped outside the cavity from 7 ps to nearly transform-limited duration of 300 fs, leading to pulse peak powers as high as 1.9 MW. Numerical simulations reveal that pulse shaping is dominated by the amplitude modulation and spectral filtering provided by a resonant semiconductor saturable absorber.
我们报告了在采用大模场面积光子晶体光纤的全正色散光纤激光器中产生高能高峰值功率脉冲的情况。自启动啁啾脉冲光纤振荡器在 15.5MHz 的重复率下提供 11W 的平均功率，产生 710nJ 的脉冲能量。输出脉冲在腔外从 7ps 展宽到几乎变换极限的 300fs 持续时间，导致脉冲峰值功率高达 1.9MW。数值模拟表明，脉冲整形主要由共振半导体可饱和吸收体提供的振幅调制和光谱滤波来控制。
