Annular polishing of large-aperture Nd-doped metaphosphate glasses

Haiyang Shan; Xueke Xu; Hongbo He; Fulin Wu; Kui Yi; Jianda Shao

doi:10.1117/12.2019760

9 July 2013 Annular polishing of large-aperture Nd-doped metaphosphate glasses

Haiyang Shan, Xueke Xu, Hongbo He, Fulin Wu, Kui Yi, Jianda Shao

Proceedings Volume 8786, Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers; 87861S (2013) https://doi.org/10.1117/12.2019760
Event: SPIE/SIOM Pacific Rim Laser Damage: Optical Materials for High-Power Lasers, 2013, Shanghai, China

Abstract

Large-aperture Nd-doped metaphosphate glasses are used in high-power/high-energy laser facilities. High transmission wave front accuracy of Nd-doped metaphosphate glasses is required to decrease beam distortion, which affects the focus ability and damages optical components. Elliptical shape astigmatism of the transmission wave front easily occurs when Nd-doped metaphosphate glasses are detected and utilized at Brewster incident angle compared with zero angle. The astigmatism is difficult to decrease for precision annular polishing because the surface profile adjustment of the polishing pitch plane has low accuracy. Non-uniform removal at different velocity rates between the pitch plane and Nd-doped metaphosphate glasses can be used to eliminate horizontal elliptical-shaped astigmatism. The improved process contributes to the production of high-efficiency Nd-doped metaphosphate glasses.

Citation Download Citation

Haiyang Shan, Xueke Xu, Hongbo He, Fulin Wu, Kui Yi, and Jianda Shao "Annular polishing of large-aperture Nd-doped metaphosphate glasses", Proc. SPIE 8786, Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers, 87861S (9 July 2013); https://doi.org/10.1117/12.2019760

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