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Opt Lett. 2005 Oct 15;30(20):2766-8.

Investigation of laser annealing parameters for optimal laser-damage performance in deuterated potassium dihydrogen phosphate.

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  • 1Lawrence Livermore National Laboratory, Livermore, California 94551-0808, USA. negres2@llnl.gov


Laser annealing via preexposure to laser pulses at sub-damage-threshold fluences is known to improve the resistance of KDP crystals to laser-induced damage. Using a specific damage-testing method, we investigate the laser annealing process as a function of fluence and number of preexposure pulses (at 355 nm, 2.5 ns). Our aim is to reveal the key laser parameters in order to devise a practical and efficient protocol for optimizing performance of the material for operation in laser systems in the near UV. Results suggest that a near twofold improvement to the laser-damage performance can be achieved with a limited number of preexposure pulses.

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