Repetitive petawatt-class laser with near-diffraction-limited focal spot and transform-limited pulse duration

نویسندگان

  • Cheng Liu
  • Sudeep Banerjee
  • Jun Zhang
  • Shouyuan Chen
  • Kevin Brown
  • Jared Mills
  • Nathan Powers
  • Baozhen Zhao
  • Gregory Golovin
  • Isaac Ghebregziabher
  • Donald Umstadter
چکیده

A repetitive petawatt-class Ti:sapphire laser system operating with high spatial and temporal beam quality is demonstrated. Maximum pulse energy of 30 J is obtained via five multi-pass amplification stages. Closed-loop feedback control systems in the temporal and spatial domains are used to yield Fourier-transform-limited pulse duration (33.7 fs), and diffraction-limited focal spot sizes (with several different tight focusing optics). The laser parameters have been fully characterized at high-power, and are monitored in real-time, to ensure that they meet the experimental requirements for laser-wakefield electron acceleration and x-ray generation.

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تاریخ انتشار 2013