WANG Yan-Zhi1,2, SHAO Jian-Da1, DONG Hong-Cheng1,2, ZHANG Wei-Li1, CUI Yun1, HE Hong-Bo1, FAN Zheng-Xiu1
1Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 10039
Design and Fabrication of Chirped Mirror
WANG Yan-Zhi1,2, SHAO Jian-Da1, DONG Hong-Cheng1,2, ZHANG Wei-Li1, CUI Yun1, HE Hong-Bo1, FAN Zheng-Xiu1
1Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 10039
摘要Chirped mirrors (CMs) are designed and manufactured. The optimized CM provides a group delay dispersion (GDD) of around -60 fs2 and average reflectivity of 99.4% with bandwidth 200nm at a central wavelength of 800nm. The CM structure consists of 52 layers of alternating high refractive index Ta2O5 and low refractive index SiO2. Measurement results show that the control of CM manufacturing accuracy can meet our requirement through time control with ion beam sputtering. Because the GDD of CMs is highly sensitive to small discrepancies between the layer thickness of calculated design and those of the manufactured mirror, we analyze the error sources which result in thickness errors and refractive index inhomogeneities in film manufacture.
Abstract：Chirped mirrors (CMs) are designed and manufactured. The optimized CM provides a group delay dispersion (GDD) of around -60 fs2 and average reflectivity of 99.4% with bandwidth 200nm at a central wavelength of 800nm. The CM structure consists of 52 layers of alternating high refractive index Ta2O5 and low refractive index SiO2. Measurement results show that the control of CM manufacturing accuracy can meet our requirement through time control with ion beam sputtering. Because the GDD of CMs is highly sensitive to small discrepancies between the layer thickness of calculated design and those of the manufactured mirror, we analyze the error sources which result in thickness errors and refractive index inhomogeneities in film manufacture.
WANG Yan-Zhi;SHAO Jian-Da;DONG Hong-Cheng;ZHANG Wei-Li;CUI Yun;HE Hong-Bo;FAN Zheng-Xiu. Design and Fabrication of Chirped Mirror[J]. 中国物理快报, 2009, 26(9): 94209-094209.
WANG Yan-Zhi, SHAO Jian-Da, DONG Hong-Cheng, ZHANG Wei-Li, CUI Yun, HE Hong-Bo, FAN Zheng-Xiu. Design and Fabrication of Chirped Mirror. Chin. Phys. Lett., 2009, 26(9): 94209-094209.
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2009, Vol. 26 
