Lemos N, Cardoso L, Geada J, Figueira G, Albert F, Dias J M
Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California, 94550, USA.
GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisbon, Portugal.
Sci Rep. 2018 Feb 16;8(1):3165. doi: 10.1038/s41598-018-21392-z.
We experimentally demonstrate that plasma waveguides produced with ultra-short laser pulses (sub-picosecond) in gas jets are capable of guiding high intensity laser pulses. This scheme has the unique ability of guiding a high-intensity laser pulse in a plasma waveguide created by the same laser system in the very simple and stable experimental setup. A hot plasma column was created by a femtosecond class laser that expands into an on-axis parabolic low density profile suitable to act as a waveguide for high intensity laser beams. We have successfully guided ~10 W cm laser pulses in a 8 mm long hydrogen plasma waveguide with a 35% guiding efficiency.
我们通过实验证明，在气体喷流中用超短激光脉冲（亚皮秒）产生的等离子体波导能够引导高强度激光脉冲。该方案具有在由同一激光系统创建的等离子体波导中引导高强度激光脉冲的独特能力，实验装置非常简单且稳定。飞秒级激光产生了一个热等离子体柱，该等离子体柱扩展成轴向抛物形低密度分布，适合用作高强度激光束的波导。我们已在一个8毫米长的氢等离子体波导中成功引导了~10 W cm的激光脉冲，引导效率为35%。
