Characteristics of Laser-Induced Surface Damage on Large-Aperture KDP Crystals at 351 nm
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Abstract
Laser-induced damage often determines the effective lifetime of an optic in large high-energy laser facilities. We present the damage performance on the rear surface of a large-aperture KDP crystal for 351 nm, 5 ns laser pulses. Surface damage shows a lower threshold than bulk damage after conditioning. Craters initiated on the scratch are found to increase with the shot number before filling the scratch. The experimental results reveal that damage initiation is mainly caused by extrinsic nanoabsorbers buried in the surface during the large-aperture laser operation.
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TIAN Ye, HAN Wei, CAO Hua-Bao, LI Fu-Quan, FENG Bin, ZHAO Jun-Pu, ZHENG Kui-Xing, ZHU Qi-Hua, ZHENG Wan-Guo. Characteristics of Laser-Induced Surface Damage on Large-Aperture KDP Crystals at 351 nm[J]. Chin. Phys. Lett., 2015, 32(2): 027801. DOI: 10.1088/0256-307X/32/2/027801
TIAN Ye, HAN Wei, CAO Hua-Bao, LI Fu-Quan, FENG Bin, ZHAO Jun-Pu, ZHENG Kui-Xing, ZHU Qi-Hua, ZHENG Wan-Guo. Characteristics of Laser-Induced Surface Damage on Large-Aperture KDP Crystals at 351 nm[J]. Chin. Phys. Lett., 2015, 32(2): 027801. DOI: 10.1088/0256-307X/32/2/027801
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TIAN Ye, HAN Wei, CAO Hua-Bao, LI Fu-Quan, FENG Bin, ZHAO Jun-Pu, ZHENG Kui-Xing, ZHU Qi-Hua, ZHENG Wan-Guo. Characteristics of Laser-Induced Surface Damage on Large-Aperture KDP Crystals at 351 nm[J]. Chin. Phys. Lett., 2015, 32(2): 027801. DOI: 10.1088/0256-307X/32/2/027801
TIAN Ye, HAN Wei, CAO Hua-Bao, LI Fu-Quan, FENG Bin, ZHAO Jun-Pu, ZHENG Kui-Xing, ZHU Qi-Hua, ZHENG Wan-Guo. Characteristics of Laser-Induced Surface Damage on Large-Aperture KDP Crystals at 351 nm[J]. Chin. Phys. Lett., 2015, 32(2): 027801. DOI: 10.1088/0256-307X/32/2/027801
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