Anti-Reflective Fluoride Coatings for Widely Tunable Deep-Ultraviolet Diode-Pumped Solid-State Laser Applications |
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| Authors: | LI Bin-Cheng LIN Da-Wei HAN Yan-Ling GUO Chun ZHANG Yun-Dong LIU Hong-Xiang |
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| Affiliation: | Key Laboratory of Beam Control, and Institute of Optics andElectronics, Chinese Academy of Sciences, Chengdu 610209Graduate University of the Chinese Academy of Sciences, Beijing100049 |
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| Abstract: | An anti-reflective (AR) fluoride coating in the 170-230 nm spectral range is prepared by the thermal evaporation method for the applications of widely tunable deep-ultraviolet diode-pumped solid-state lasers. The transmittance of an AR coated calcium fluoride (CaF2) window in thickness 3 mm is measured to be in the range of 95.8% at 170 nm to 97.1% at 230 nm, with the maximum transmittance 99.2% and the minimum residual reflectance 0.04% appeared at 195 nm. The experimental results indicate that treating the AR coated window and the bare substrate with ultraviolet irradiation can significantly improve their optical performance. |
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| Keywords: | 42.79.Wc 78.20.+e 42.55.Xi |
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