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Subsurface defects of fused silica optics would vary with HF-etched process. In this paper, the subsurface defects characteristics of HF-etched fused silica optics and their effects on laser induced damage were investigated. The results suggest that most of metal impurities defects (especially Ce element) of fused silica optics can be dissolved in strong acid solution. Subsurface damage can be removed...
Thin Ag films with the thickness of 80 A were prepared by pulsed laser deposition technique. The films were grown on MgO(100) substrates under the nitrogen pressure of 5.0 Pa at room temperature. The surface images of the films were observed by atomic force microscopy. The linear optical properties of the films were studied in the wavelength range of 300-800 nm. The inherent third-order nonlinear...
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