公开(公告)号：US20080069171A1

公开(公告)日：2008-03-20

申请号：US11804888

申请日：2007-05-21

申请人： Jorge Rocca ,  Henry Kapteyn ,  Magaret Mumane ,  David Gaudiosi ,  Michael Grisham ,  Tenio Popmintchev ,  Brenda Reagan

发明人： Jorge Rocca ,  Henry Kapteyn ,  Magaret Mumane ,  David Gaudiosi ,  Michael Grisham ,  Tenio Popmintchev ,  Brenda Reagan

IPC分类号： H01S3/03

CPC分类号： G02F1/353 ,  G02F1/3501 ,  G02F1/355 ,  H05G2/003 ,  H05G2/008

摘要： A pre-ionized medium created by a capillary discharge results in more efficient use of laser energy in high-order harmonic generation (HHG) from ions. It extends the cutoff photon energy, and reduces the distortion of the laser pulse as it propagates down the waveguide. The observed enhancements result from a combination of reduced ionization energy loss and reduced ionization-induced defocusing of the driving laser as well as waveguiding of the driving laser pulse. The discharge plasma also provides a means to spectrally tune the harmonics by tailoring the initial level of ionization of the medium.

摘要翻译： 通过毛细管放电产生的预电离介质可以更有效地利用来自离子的高次谐波产生（HHG）中的激光能量。 它扩展了截止光子能量，并且当激光脉冲向下传播时减小激光脉冲的失真。 所观察到的增强是由驱动激光器的电离能量损失减少和离子化引起的散焦以及驱动激光脉冲波导的组合引起的。 放电等离子体还提供了通过调节介质的初始电离水平来光谱调谐谐波的手段。