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Sub 25 fs pulses from solid-core nonlinear compression stage at 250 W of average power

机译:来自实芯非线性压缩级的25 fs脉冲,平均功率为250 W

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摘要

We report on a highpower femtosecond fiber chirped-pulse amplification system with an excellent beam quality (M~2 = 1.2) operating at 250 MHz repetition rate. We demonstrate nonlinear compression in a solid-core photonic crystal fiber at unprecedented average power levels. By exploiting self-phase modulation with subsequent chirped-mirror compression we achieve pulse shortening by more than one order of magnitude to 23 fs pulses. The use of circular polarization allows higher than usual peak powers in the broadening fiber resulting in compressed 0.9 μJ pulse energy and a peak power of 34 MW at 250 W of average power (M~2 = 1.3). This system is well suited for driving cavity-enhanced high-repetition rate high-harmonic generation.
机译:我们报告了一个高功率飞秒光纤rate脉冲放大系统,该系统在250 MHz重复频率下具有出色的光束质量(M〜2 = 1.2)。我们展示了实心光子晶体光纤在前所未有的平均功率水平下的非线性压缩。通过利用自相位调制和随后的chi镜压缩,我们将脉冲缩短了一个数量级以上,达到了23 fs脉冲。圆极化的使用可使加宽光纤的峰值功率高于通常的峰值功率,从而导致压缩的0.9μJ脉冲能量和250 W的平均功率(M〜2 = 1.3)时的峰值功率为34 MW。该系统非常适合于驱动腔增强的高重复频率高谐波产生。

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