Compact, high-repetition-rate OPCPA system for high harmonic generation
Compact, high-repetition-rate OPCPA system for high harmonic generation
复制标题
用于高谐波生成的紧凑型高重复率 OPCPA 系统
DOI：
10.1117/12.2035810
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
U. Morgner
中科院分区：
文献类型：
--
作者：
J. Matyschok;T. Binhammer;T. Lang;O. Prochnow;S. Rausch;P. Rudawski;A. Harth;M. Miranda;C. Guo;E. Lorek;J. Mauritsson;C.L. Arnold;A. L’Huillier;U. Morgner
报道了一种用于高次谐波产生的紧凑型、高重复频率光参量啁啾脉冲放大系统，该系统可产生脉冲能量为10μJ的小周期脉冲。该系统采用商用的CEP稳定型钛蓝宝石振荡器，可提供600-1200 nm的倍频程光谱。振荡器输出一方面用作用于参数放大过程的宽带信号，另一方面用作具有后续主放大和倍频的基于Yb的光纤前置放大器的窄带种子。在两个5mMBBO晶体中，利用非共线位相匹配，在200μ的重复频率下，实现了高达17 kJ的宽带参量放大。利用啁啾反射镜实现了6.3ps的高效脉冲压缩，峰值功率超过800 mW。在预热时间后，我们观察到在100分钟内的稳定度为<；0.5%RMS。参数放大部分的CE相位漂移可以通过缓慢反馈到振荡器锁相的设定值来补偿。在15min(3ms积分时间)上，CEP的稳定性优于80mrad。基于(2+1)维非线性传播编码的参数放大过程的模拟可以很好地再现实验观测到的输出光谱和能量，为今后OPCPA系统的重复率定标提供了重要的见解。该系统非常适合阿秒科学实验，这些实验得益于高重复率。我们将首先给出在Ar中产生高次谐波的结果。
A compact, high-repetition rate optical parametric chirped pulse amplifier system emitting CEP-stable, few-cycle pulses with 10 μJ of pulse energy is reported for the purpose of high-order harmonic generation. The system is seeded from a commercially available, CEP-stabilized Ti:sapphire oscillator, delivering an octave-spanning spectrum from 600-1200 nm. The oscillator output serves on the one hand as broadband signal for the parametric amplification process and on the other hand as narrowband seed for an Ytterbium-based fiber preamplifier with subsequent main amplifiers and frequency doubling. Broadband parametric amplification up to 17 μJ at 200 kHz repetition rate was achieved in two 5 mm BBO crystals using non-collinear phase matching in the Poynting-vector-walk-off geometry. Efficient pulse compression down to 6.3 fs is achieved with chirped mirrors leading to a peak power exceeding 800 MW. We observed after warm-up time a stability of < 0.5 % rms over 100 min. Drifts of the CE-phase in the parametric amplifier part could be compensated by a slow feedback to the set point of the oscillator phase lock. The CEP stability was measured to be better than 80 mrad over 15 min (3 ms integration time). The experimentally observed output spectra and energies could be well reproduced by simulations of the parametric amplification process based on a (2+1)-dimensional nonlinear propagation code, providing important insight for future repetition rate scaling of OPCPA systems. The system is well-suited for attosecond science experiments which benefit from the high repetition rate. First results for high-order harmonic generation in argon will be presented.
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影响因子：
3.8
作者：
Furch, Federico J.;Birkner, Sascha;Vrakking, Marc J. J.
通讯作者：
Vrakking, Marc J. J.
影响因子：
3.8
作者：
Harth, Anne;Schultze, Marcel;Morgner, Uwe
通讯作者：
Morgner, Uwe
影响因子：
3.8
作者：
Adachi, S.;Ishii, N.;Watanabe, S.
通讯作者：
Watanabe, S.
影响因子：
3.8
作者：
J. Matyschok;T. Lang;T. Binhammer;O. Prochnow;S. Rausch;M. Schultze;A. Harth;P. Rudawski;C. Arnold;A. L’Huillier;U. Morgner
通讯作者：
J. Matyschok;T. Lang;T. Binhammer;O. Prochnow;S. Rausch;M. Schultze;A. Harth;P. Rudawski;C. Arnold;A. L’Huillier;U. Morgner