| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Characteristics of Laser-Induced Surface and Bulk Damage of Large-Aperture Deuterated Potassium Dihydrogen Phosphate at 351nm |
| Wei Han1,2**, Li-Dan Zhou2, Yong Xiang2, Ye Tian2, Fang Wang2, Fu-Quan Li2, Li-Quan Wang2, Bin Feng2, Jun-Pu Zhao2, Kui-Xing Zheng2, Qi-Hua Zhu2, Xiao-Feng Wei2, Wan-Guo Zheng2, Ma-Li Gong1 |
1Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084
2Research Center of Laser Fusion, China Academy of Engineering Physics, Sichuan 621900
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| Cite this article: |
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Wei Han, Li-Dan Zhou, Yong Xiang et al 2016 Chin. Phys. Lett. 33 027803 |
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Abstract Deuterated potassium dihydrogen phosphate damage performance at 351 nm is studied on a large-aperture laser system. Bulk and rear-surface damage are initiated under the 3$\omega$ fluences of 6.7 J/cm$^{2}$ and 3 J/cm$^{2}$, and show different growth characteristics under multiple laser irradiations with the fluence of 6 J/cm$^{2}$. The size and number of bulk damage keep unchanged once initiated. However, surface damage size also does not grow, while surface damage number increases linearly with laser shots. Different damage thresholds and growth behaviors suggest different formations of bulk and surface damage precursors. The cause of surface damage is supposed to be near-surface absorbing particles buried under the sol-gel coating.
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Received: 26 September 2015
Published: 26 February 2016
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| PACS: |
78.20.-e
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(Optical properties of bulk materials and thin films)
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42.70.Mp
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(Nonlinear optical crystals)
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61.80.Ba
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(Ultraviolet, visible, and infrared radiation effects (including laser radiation))
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Abstract
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