Centre Lasers Intenses et Applications, Université de Bordeaux-CNRS-CEA, 351, cours de la Libération,33105 Talence Cedex, France.
Opt Lett. 2010 Jan 15;35(2):253-5. doi: 10.1364/OL.35.000253.
We present a new optical post-compression technique designed for high-energy ultrashort pulses. A large spectral broadening is achieved through rapid ionization of helium by an intense pulse (>10(15) W/cm(2)) propagating in a capillary filled with low-pressure helium. The blueshifted pulses are re-compressed with chirped mirrors and silica plates. From a terawatt Ti:sapphire laser chain providing pulses of 40 fs, 70 mJ, we demonstrate the compression of pulses down to 11.4 fs (FWHM) with a total output energy of 13.7 mJ.
我们提出了一种新的光后压缩技术，专门用于高能超短脉冲。通过在充满低压氦气的毛细管中传播的强脉冲（>10(15) W/cm(2)) 快速离化氦，实现了大的光谱展宽。用啁啾镜和硅片对蓝移脉冲进行再压缩。从提供 40 fs、70 mJ 脉冲的太瓦级钛宝石激光链，我们演示了将脉冲压缩到 11.4 fs（FWHM），总输出能量为 13.7 mJ。
