创新等离子体光学实现短脉冲激光的快速聚焦，以达到极高强度。

Fast focusing of short-pulse lasers by innovative plasma optics toward extreme intensity.

机构信息

Laboratoire pour l'Utilisation des Lasers Intenses, UMR 7605, CNRS, Commissariat à l'Energie Atomique, and Université Paris VI, Ecole Polytechnique, 91128 Palaiseau Cedex, France.

出版信息

Opt Lett. 2010 Jul 1;35(13):2314-6. doi: 10.1364/OL.35.002314.

DOI:10.1364/OL.35.002314

PMID:20596231

Abstract

We developed a compact plasma-based focusing optic that, in one step, increases the peak intensity of ultrahigh-intensity lasers without modifying the laser system itself. By using a plasma-based focusing optic with extremely small f-number (f/0.4), we have experimentally demonstrated a fivefold reduction of the focal spot size (from 4.4 to 0.9 microm), thus producing an at least eightfold enhancement of the laser light intensity. This innovative plasma-based optic opens the way for the study of high-energy-density and high-field science at intensities greater than presently available.

摘要

我们研发了一种紧凑的基于等离子体的聚焦光学器件，该器件能够在不改变激光系统本身的情况下，将超高强度激光的峰值强度提高一倍。通过使用具有极小 f 数（f/0.4）的基于等离子体的聚焦光学器件，我们已经在实验中演示了将焦点光斑尺寸减小五倍（从 4.4 微米减小到 0.9 微米），从而使激光强度至少提高了八倍。这种创新的基于等离子体的光学器件为研究目前可用强度以上的高能密度和强场科学开辟了道路。