Pump-pump experiment in KH2PO4 crystals: Coupling two different wavelengths to identify the laser-induced damage mechanisms in the nanosecond regime

被引：24

作者：

Reyne, S. ^{[1
]}

Duchateau, G. ^{[2
]}

Natoli, J-Y ^{[3
]}

Lamaignere, L. ^{[1
]}

机构：

[1] CEA, CESTA, F-33114 Le Barp, France

[2] CEA Le Ripault, F-37260 Monts, France

[3] CNRS, Inst Fresnel, UMR 6133, F-13397 Marseille, France

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 12期

关键词：

electromagnetic wave scattering; heat transfer; high-speed optical techniques; hydrogen compounds; laser beam effects; multiphoton processes; optical pumping; photoionisation; potassium compounds; PULSES;

D O I：

10.1063/1.3368121

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Laser-induced damage experiments based on an original pump-pump set-up have been carried out in the nanosecond regime for KH2PO4 (KDP) crystal. The impact of a simultaneous mixing of 351 nm and 1064 nm pulses has been experimentally studied and compared to a model based on heat transfer, the Mie theory and a Drude model. This study sheds light on the physical processes implied in the KDP laser damage. In particular, a three-photon ionization mechanism is shown to be responsible for laser damage in KDP.

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页数：3

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