| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Laser Resistance of Ta2O5/SiO2 and ZrO2/SiO2 Optical Coatings under 2μm Femtosecond Pulsed Irradiation |
LIU Na1,2, WANG Ying-Jian1, ZHOU Ming1,2, JING Xu-Feng1,2, WANG Yan-Zhi1,2, CUI Yun1, JIN Yun-Xia1 |
| 1Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 2Graduate School of Chinese Academy of Sciences, Beijing 100049 |
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| Cite this article: |
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LIU Na, WANG Ying-Jian, ZHOU Ming et al 2010 Chin. Phys. Lett. 27 074215 |
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Abstract Ta2O5/SiO2 and ZrO2/SiO2 high reflecting (HR) coatings are prepared by ion beam sputtering and electron beam evaporation, respectively. The laser-induced damage thresholds (LIDTs) of these samples are investigated with 2 μm femtosecond pulse lasers (80 fs, 1 kHz). It is found that the Ta2O5/SiO2 HR coating has a higher capability of laser damage resistance than the ZrO2/SiO2 HR coating in the 2 μm femtosecond regime. The scanning electron microscope results show that the damage sites of the ZrO2/SiO2 HR coating have a relatively porous structure, the loose structure of coatings will provide more sites for water molecules, and the LIDTs of HR coatings will be reduced as a result of the strong water absorption at the wavelength of 2 μm.
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| Keywords:
42.79.Wc
68.65.Ac
42.65.Re
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Received: 14 April 2010
Published: 28 June 2010
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| PACS: |
42.79.Wc
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(Optical coatings)
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68.65.Ac
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(Multilayers)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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