Gaussian- versus flat-top-pumping of a mid-IR ZGP RISTRA OPO

被引：18

作者：

Eichhorn, M. ^{[1
]}

Stoeppler, G. ^{[1
]}

Schellhorn, M. ^{[1
]}

Zawilski, K. T. ^{[2
]}

Schunemann, P. G. ^{[2
]}

机构：

[1] French German Res Inst St Louis ISL, F-68301 St Louis, France

[2] BAE Syst, Nashua, NH 03061 USA

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2012年 / 108卷 / 01期

关键词：

OPTICAL PARAMETRIC OSCILLATOR; HIGH-ENERGY; BEAM; PERFORMANCE; DESIGN; SYSTEM;

D O I：

10.1007/s00340-012-4979-8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The influence of the pump intensity profile on the performance of a mid-IR ZGP RISTRA OPO at 6.45 A mu m is studied for a flat-top pump profile and compared to a Gaussian pump distribution at the same pump peak fluence of 0.81 J/cm(2). Due to a coherent beam transformation a flat-top pump beam with a plane wavefront and excellent beam quality of M (2)a parts per thousand 1.25 is generated. The output of up to 5 mJ pulse idler energy (0.5 W average idler power) is identical in both cases, showing that flat-top pumping allows a reduction of the OPO crystal volume by 55 % while still maintaining a good output beam quality of M (2)< 2.7 for the idler and M (2)< 2.5 for the signal. The experimental results are compared to the SNLO RISTRA model and the limitations of the model are discussed.

引用

页码：109 / 115

页数：7

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