Full Aperture CO2Laser Process to Improve Laser Damage Resistance of Fused Silica Optical Surface | Zendy

Wei Liao | Zendy; Chuanchao Zhang | Zendy; Sun Xiaofen | Zendy; Lijuan Zhang | Zendy; Xiaodong Yuan | Zendy

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Full Aperture CO₂Laser Process to Improve Laser Damage Resistance of Fused Silica Optical Surface

Author(s) -

Wei Liao,

Chuanchao Zhang,

Sun Xiaofen,

Lijuan Zhang,

Xiaodong Yuan

Publication year - 2014

Publication title -

advances in condensed matter physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.314

H-Index - 26

eISSN - 1687-8124

pISSN - 1687-8108

DOI - 10.1155/2014/676108

Subject(s) - galvanometer , materials science , laser , optics , aperture (computer memory) , surface (topology) , power (physics) , acoustics , physics , geometry , mathematics , quantum mechanics

An improved method is presented to scan the full-aperture optical surface rapidly by using galvanometer steering mirrors. In contrast to the previous studies, the scanning velocity is faster by several orders of magnitude. The velocity is chosen to allow little thermodeposition thus providing small and uniform residual stress. An appropriate power density is set to obtain a lower processing temperature. The proper parameters can help to prevent optical surface from fracturing during operation at high laser flux. S-on-1 damage test results show that the damage threshold of scanned area is approximately 40% higher than that of untreated area

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