Accurate target-plane focal-spot characterization in high-energy laser systems using phase retrieval

被引：32

作者：

Kruschwitz, B. E. ^{[1
]}

Bahk, S. -W. ^{[1
]}

Bromage, J. ^{[1
]}

Moore, M. D. ^{[1
]}

Irwin, D.

机构：

[1] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 19期

关键词：

ALGORITHMS;

D O I：

10.1364/OE.20.020874

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Target-plane intensities on the short-pulse beamlines of OMEGA EP, a petawatt-class laser, are characterized on-shot using the focal-spot diagnostic (FSD), an indirect wavefront-based measurement. Phase-retrieval methods are employed using on-shot and offline camera-based far-field measurements to improve the wavefront measurements and yield more-accurate, repeatable focal-spot predictions. Incorporation of these techniques has improved the mean cross-correlation between the FSD predictions and direct far-field fluence measurements in the target chamber from 0.78 to 0.94. (C) 2012 Optical Society of America

引用

页码：20874 / 20883

页数：10

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