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
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
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.
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.
(Ultrafast processes; optical pulse generation and pulse compression)
引用本文:
LIU Na;WANG Ying-Jian;ZHOU Ming;JING Xu-Feng;WANG Yan-Zhi;CUI Yun;JIN Yun-Xia. Laser Resistance of Ta2O5/SiO2 and ZrO2/SiO2 Optical Coatings under 2μm Femtosecond Pulsed Irradiation[J]. 中国物理快报, 2010, 27(7): 74215-074215.
LIU Na, WANG Ying-Jian, ZHOU Ming, JING Xu-Feng, WANG Yan-Zhi, CUI Yun, JIN Yun-Xia. Laser Resistance of Ta2O5/SiO2 and ZrO2/SiO2 Optical Coatings under 2μm Femtosecond Pulsed Irradiation. Chin. Phys. Lett., 2010, 27(7): 74215-074215.
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2010, Vol. 27 
