Generation of high-contrast millijoule pulses by optical parametric chirped-pulse amplification in periodically poled KTiOPO4

被引：28

作者：

Jovanovic, I

Brown, CG

Ebbers, CA

Barty, CPJ

Forget, N

Le Blanc, C

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Ecole Polytech, Lab Utilisat Lasers Intenses, F-91128 Palaiseau, France

来源：

OPTICS LETTERS | 2005年 / 30卷 / 09期

关键词：

D O I：

10.1364/OL.30.001036

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A new high-contrast, high-gain optical parametric chirped-pulse amplifier (OPCPA) architecture is demonstrated in periodically poled KTiOPO4 (PPKTP). This architecture overcomes parametric fluorescence contrast limitations of the OPCPA in periodically poled materials. The scheme is based on two passes of a single relay-imaged pump pulse and a free-propagating signal pulse through a 1.5 mm X 5 mm X 7.5 mm PPKTP crystal. The output energy of 1.2 mJ is generated at a center wavelength of 1053 nm by 24 mJ of pump energy. A prepulse contrast level of > 3 X 10(7) was measured with > 10(6) saturated gain in the amplifier. Amplified pulses were compressed to 200 fs. This simple and versatile concept requires only a modest pump energy from a commercial pump laser and represents a possible high-contrast front end for high-energy Nd:glass-based petawatt-class lasers. (c) 2005 Optical Society of America.

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页码：1036 / 1038

页数：3

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