Abstract

Optical nonlinearity was induced in fused silica through proton implantation. Average χ⁽²⁾ of the order of 1.0 pm/V were induced in low-water fused silica, with isolated regions exhibiting χ⁽²⁾ as high as 1.6 pm/V. A minimum dosage of 0.25–0.5 mC was found to be effective in generating the second harmonic in fused silica. A minimum irradiation time of 10–15 s was found to be necessary to set up the space-charge region adequately. Finally, the predominant type of microscopic lattice damage associated with proton-bombarded fused silicas was found to be the silicon E^′ defect site.

© 1996 Optical Society of America

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