| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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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 |
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| Cite this article: |
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WANG Yan-Zhi, SHAO Jian-Da, DONG Hong-Cheng et al 2009 Chin. Phys. Lett. 26 094209 |
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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.
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| Keywords:
42.79.Wc
68.55.Jk
68.60.Wm
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Received: 02 June 2009
Published: 28 August 2009
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