Study on the laser damage character of fused silica by different fusing atmosphere and heat treatment process

Hui Wang; Zaikui Xiang; Zhixing Gao; Yufen Wang; Lanjian Nie; Zhufeng Shao; Chuandong Rao; Xiuzhang Tang

doi:10.1117/12.2185897

14 July 2015 Study on the laser damage character of fused silica by different fusing atmosphere and heat treatment process

Hui Wang, Zaikui Xiang, Zhixing Gao, Yufen Wang, Lanjian Nie, Zhufeng Shao, Chuandong Rao, Xiuzhang Tang

Author Affiliations +

Proceedings Volume 9532, Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers; 95321T (2015) https://doi.org/10.1117/12.2185897
Event: Pacific Rim Laser Damage, 2015, Jiading, Shanghai, China

Abstract

The result shows that the fusing atmosphere and heat treatment process have different affluence on the laser induced damage threshold (LIDT) by 355nm and 248nm laser pules. As for the fused silca, the atmosphere and the temperature during the fuseing and heat treatment process contributes to the changing of structure and micro-composition. For high power 355nm laser pules, the affluence of H₂ during the fusing process is benefical to reduced the destructive probability, the LIDT-values is about 20-22.2 J/cm²; But for the 248nm laser pules ,the highest LIDT-values is about 8-10J/cm² of the fused silca fused with surplus O₂ atmosphere. In order to improve the laser damage character, the heat treatment process is one of the effective way for the fused silica. We have investigated the peculiar heat treatment process with O₂ atmosphere by 1100℃ can boost the LIDT to 28.2 J/cm² and 13 J/cm² by 355nm and 248nm laser pules, while the process time is not as long as better.

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Hui Wang, Zaikui Xiang, Zhixing Gao, Yufen Wang, Lanjian Nie, Zhufeng Shao, Chuandong Rao, and Xiuzhang Tang "Study on the laser damage character of fused silica by different fusing atmosphere and heat treatment process", Proc. SPIE 9532, Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers, 95321T (14 July 2015); https://doi.org/10.1117/12.2185897

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