Characteristics of 355nm Laser Damage in KDP and DKDP Crystals
HU Guo-Hang1,2, ZHAO Yuan-An1, SUN Shao-Tao3, LI Da-Wei1, LIU Xiao-Feng1,2, SUN Xun3, SHAO Jian-Da1, FAN Zheng-Xiu1
1Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of Chinese Academy of Sciences, Beijing 1000493State Key Laboratory of Crystal Materials, Shandong University, Shandong 250100
Characteristics of 355nm Laser Damage in KDP and DKDP Crystals
HU Guo-Hang1,2, ZHAO Yuan-An1, SUN Shao-Tao3, LI Da-Wei1, LIU Xiao-Feng1,2, SUN Xun3, SHAO Jian-Da1, FAN Zheng-Xiu1
1Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of Chinese Academy of Sciences, Beijing 1000493State Key Laboratory of Crystal Materials, Shandong University, Shandong 250100
摘要We present the characteristics of bulk damage induced by the third harmonic of Nd:YAG laser irradiation in KDP and DKDP crystals. Bulk damage occurs as a few or a series of pinpoints consisting of a core and the deforming zone. The results of a 1-on-1 test reveal that the pinpoint size increases with incvreasing fluence, and the pinpoint density increases exponentially with increasing fluence. The results of an s-on-1 test indicate that the pinpoint density increases gradually with laser pulse number, but the size does not grow. These results are consistent with a model in which nanoabsorbers are assumed to exist in the crystal and the initiation of damage is determined by heating them to the critical temperature.
Abstract：We present the characteristics of bulk damage induced by the third harmonic of Nd:YAG laser irradiation in KDP and DKDP crystals. Bulk damage occurs as a few or a series of pinpoints consisting of a core and the deforming zone. The results of a 1-on-1 test reveal that the pinpoint size increases with incvreasing fluence, and the pinpoint density increases exponentially with increasing fluence. The results of an s-on-1 test indicate that the pinpoint density increases gradually with laser pulse number, but the size does not grow. These results are consistent with a model in which nanoabsorbers are assumed to exist in the crystal and the initiation of damage is determined by heating them to the critical temperature.
(Optical properties of bulk materials and thin films)
引用本文:
HU Guo-Hang;ZHAO Yuan-An;SUN Shao-Tao;LI Da-Wei;LIU Xiao-Feng;SUN Xun;SHAO Jian-Da;FAN Zheng-Xiu. Characteristics of 355nm Laser Damage in KDP and DKDP Crystals[J]. 中国物理快报, 2009, 26(9): 97802-097802.
HU Guo-Hang, ZHAO Yuan-An, SUN Shao-Tao, LI Da-Wei, LIU Xiao-Feng, SUN Xun, SHAO Jian-Da, FAN Zheng-Xiu. Characteristics of 355nm Laser Damage in KDP and DKDP Crystals. Chin. Phys. Lett., 2009, 26(9): 97802-097802.
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