12 May 2017 The effect of dynamic etching on surface quality and laser damage resistance for fused silica optics
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Proceedings Volume 10173, Fourth International Symposium on Laser Interaction with Matter; 1017325 (2017) https://doi.org/10.1117/12.2267494
Event: 4th International Symposium on Laser Interaction with Matter, 2016, Chengdu, China
Abstract
Fused silica optics were treated by dynamic etching using buffered hydrofluoric acid (BHF) with different etching depths. The transmissivity of fused silica slightly increases in deep UV (DUV) range after dynamic etching. Surface qualities of fused silica were characterized in terms of surface roughness, surface profile and photoluminescence (PL) spectra. The results show that dynamic etching has a slight impact on surface RMS roughness.PL defects gradually reduces by dynamic etching, and laser damage resistance of fused silica continuously increases with etching depth extending. When removal depth increases to ~12μm, the damage threshold is the double that of the unetched surface. However, surface profile continuously deteriorates with etching depth increasing. Appropriate etching amount is very important for improving damage resistance and mitigating surface profile deteriorating of fused silica during etching process simultaneously. The study is expected to contribute to the practical application of dynamic etching for mitigating laser induced degradation of fused silica optics under UV laser irradiation.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhiqiang Wang, Zhiqiang Wang, Hongwei Yan, Hongwei Yan, Xiaodong Yuan, Xiaodong Yuan, Yuan Li, Yuan Li, Ke Yang, Ke Yang, Lianghong Yan, Lianghong Yan, Lijuan Zhang, Lijuan Zhang, Taixiang Liu, Taixiang Liu, Heyang Li, Heyang Li, } "The effect of dynamic etching on surface quality and laser damage resistance for fused silica optics", Proc. SPIE 10173, Fourth International Symposium on Laser Interaction with Matter, 1017325 (12 May 2017); doi: 10.1117/12.2267494; https://doi.org/10.1117/12.2267494
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