Self-compression of multi-millijoule femtosecond laser pulses and dramatic increase of the peak intensity are found in pressurized helium and neon within a range of intensity in which the ionization modification of the material parameters by the pulse is negligible. The pulse propagation is studied by the (3+1)-dimensional nonlinear Schroedinger equation including basic lowest order optical processes -- diffraction, group velocity dispersion of second order, and Kerr nonlinearity of third order. Smooth and well controllable pulse propagation dynamics is found. Constructing of compressed pulse of controllable parameters at given space target point can be achieved by a proper chose of the pulse energy and/or gas pressure.
Raman-enhanced spectral compression of high-energy femtosecond laser pulses in molecular gases
Huazhong University of Science and Technology（华中科技大学）；Wuhan National Laboratory for Optoelectronics（武汉光电国家研究中心）；Cornell University（康奈尔大学）；Xi’an Institute of Applied Optics（西安应用光学研究所）
Real-time spectroscopic monitoring of continuous synthesis of zinc oxide nanostructures in femtosecond laser fabricated 3D microfluidic microchannels with integrated on-chip fiber probe array
Bright coherent attosecond X-ray pulses from beam-driven relativistic mirrors
ELI Beamlines Facility, Extreme Light Infrastructure ERIC（极光大设施，极端光基础设施欧洲研究共同体）；Faculty of Mathematics and Physics, Charles University（查理大学数学物理学院）；Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague（布拉格捷克理工大学核科学与物理工程学院）；Kansai Photon Science Institute, National Institutes for Quantum Science and Technology（日本量子科学技术研究机构关西光子科学研究所）
Mutually phase-stable tunable attosecond soft X-ray attosecond pulses from a free-electron laser
SLAC National Accelerator Laboratory（SLAC国家加速器实验室）；Stanford PULSE Institute, SLAC National Accelerator Laboratory（斯坦福PULSE研究所，SLAC国家加速器实验室）；Department of Applied Physics, Stanford University（斯坦福大学应用物理系）；J.R. Macdonald Laboratory, Kansas State University（堪萨斯州立大学J.R.麦克唐纳实验室）
