Self-Guiding of Ultrashort Relativistically intense Laser Pulses to the Limit of Nonlinear Pump Depletion

被引：0

作者：

Ralph, J. E. ^{[1
]}

Marsh, K. A. ^{[1
]}

Pak, A. E. ^{[1
]}

Lu, W. ^{[1
]}

Clayton, C. E. ^{[1
]}

Fang, F. ^{[1
]}

Tsung, F. S. ^{[2
]}

Mori, W. B. ^{[1
,2
]}

Joshi, C. ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

来源：

ADVANCED ACCELERATOR CONCEPTS | 2009年 / 1086卷

关键词：

laser wakefield acceleration; LWFA; self-guiding; self-focusing;

D O I：

暂无

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A study of self-guiding of ultra short, relativistically intense laser pulses is presented. Here, the laser pulse length is on the order of the nonlinear plasma wavelength and the normalized vector potential is greater than one. Self-guiding of ultrashort laser pulses over tens of Rayliegh lengths is possible when driving a highly nonlinear wake. In this case, self-guiding is limited by nonlinear pump depletion[ 1,2]. Erosion of the pulse due to diffraction at the head of the laser pulse is minimized for spot sizes close to the blow-out radius[1]. This is due to the slowing of the group velocity of the photons at the head of the laser pulse. Using an approximately 10TW Ti:Sapphire laser with a pulse length of approximately 50fs, experimental results are presented showing self-guiding over lengths exceeding 30 Rayliegh lengths in various length Helium gas jets. Fully explicit 3D PIC simulations supporting the experimental results are also presented.

引用

页码：196 / +

页数：2

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