Rothhardt J, Hädrich S, Gottschall T, Clausnitzer T, Limpert J, Tünnermann A
Friedrich Schiller University Jena, Institute of Applied Physics, Albert-Einstein-Str. 15, 07745 Jena, Germany.
Opt Express. 2009 Dec 21;17(26):24130-6. doi: 10.1364/OE.17.024130.
We report on a compact Gigawatt peak power OPCPA system which is pumped by the second harmonic of an Yb-doped fiber amplifier and seeded by a cavity dumped Ti:Sapphire oscillator. Picosecond pump pulses for the OPCPA are generated by spectral filtering and directly amplified to 1 mJ pulse energy in several fiber amplifiers, without the need of chirped pulse amplification. Since no stretcher and compressor is required, the pump laser is very compact and easy to operate. The two stage optical parametric amplifier delivers 35 fs pulses with 53 microJ pulse energy and 1.1 GW peak power at 40 kHz repetition rate. Additionally, the scaling potential of this approach is discussed.
我们报道了一种紧凑型千兆瓦峰值功率光参量啁啾脉冲放大（OPCPA）系统，该系统由掺镱光纤放大器的二次谐波泵浦，并由腔倒空钛宝石振荡器种子注入。OPCPA的皮秒泵浦脉冲通过光谱滤波产生，并在几个光纤放大器中直接放大到1 mJ的脉冲能量，无需啁啾脉冲放大。由于不需要展宽器和压缩器，泵浦激光器非常紧凑且易于操作。两级光参量放大器在40 kHz重复频率下产生35 fs脉冲，脉冲能量为53 μJ，峰值功率为1.1 GW。此外，还讨论了这种方法的扩展潜力。
