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Proceedings Paper

Toward a better understanding of multi-wavelength effects on KDP crystals
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Paper Abstract

Laser damage in KDP crystals has been studied since several years and more accurately with emergence of projects like LMJ (Laser MégaJoule, in France) or NIF (National Ignition Facility, in US). Laser damage tests are essentially performed at 351-nm wavelength (3ω), with regards to their optical behaviours on forementioned facilities. But only few data are available at 1064 nm (1ω) and at 532 nm (2ω), and even with wavelength-mixing more representative of operational conditions of KDP crystals. So in a first approach, we tried to carry out an identity chart of the crystal by performing mono-wavelength tests at 1ω, 2ω and 3ω. Then, a campaign of combination of multi-wavelength (typically 3ω and 1ω) tests has been started with several temporal delays between 3ω and 1ω pulses. These first results lead us to improve pre-existing modelling codes developed by CEA, which have proved their robustness to 3ω -experiment results. Foremost interests consist in implementing wavelength dependency and energy deposition mechanism as a consequence of our first observations on KDP.

Paper Details

Date Published: 18 May 2009
PDF: 11 pages
Proc. SPIE 7361, Damage to VUV, EUV, and X-Ray Optics II, 73610Z (18 May 2009); doi: 10.1117/12.822852
Show Author Affiliations
Stéphane Reyné, CEA/CESTA (France)
Marc Loiseau, CEA/CESTA (France)
Guillaume Duchateau, CEA/Le Ripault (France)
Jean-Yves Natoli, Institut Fresnel, CNRS (France)
Laurent Lamaignère, CEA/CESTA (France)

Published in SPIE Proceedings Vol. 7361:
Damage to VUV, EUV, and X-Ray Optics II
Libor Juha; Saša Bajt; Ryszard Sobierajski, Editor(s)

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