22 W average power multiterawatt femtosecond laser chain enabling 1019 W/cm2 at 100 Hz

被引：14
|
作者：
Clady, R. [1 ]
Azamoum, Y. [1 ]
Charmasson, L. [1 ]
Ferre, A. [1 ]
Uteza, O. [1 ]
Sentis, M. [1 ]
机构：
[1] Aix Marseille Univ, CNRS, LP3, UMR 7341, F-13288 Marseille, France
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2018年 / 124卷 / 05期
关键词：
HIGH-ENERGY; PULSE-COMPRESSION; CONTRAST; AMPLIFIERS; GRATINGS; DESIGN; TW;
D O I：
10.1007/s00340-018-6958-1
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We measure the wavefront distortions of a high peak power ultrashort (23 fs) laser system under high average power load. After 6 min-100 Hz operation of the laser at full average power (> 22 W after compression), the thermally induced wavefront distortions reach a steady state and the far-field profile of the laser beam no longer changes. By means of a deformable mirror located after the vacuum compressor, we apply a static pre-compensation to correct those aberrations allowing us to demonstrate a dramatic improvement of the far-field profile at 100 Hz with the reduction of the residual wavefront distortions below lambda/16 before focusing. The applied technique provides 100 Hz operation of the femtosecond laser chain with stable pulse characteristics, corresponding to peak intensity above 10(19) W/cm(2) and average power of 19 W on target, which enables the study of relativistic optics at high repetition rate using a moderate f-number focusing optics (f/4.5).
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页数：9
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