Laser-induced fluorescence and nonlinear optical properties of ion-implanted fused silica

摘要

We report absorption, fluorescence and nonlinear optical properties of fused silica implanted with Ti, Cu and Bi and doses of 1(center dot)10(sup 15) ions/cm(sup 2) to 6(center dot)10(sup 16) ions/cm(sup 2) when irradiated with 532 nm laser light. The fluorescence spectrum is a broad band around 640 nm shows little variation for all ion species. Absorption as function of implanted dose shows a threshold for Ti between 1(center dot)10(sup 16) ions/cm(sup 2) and 6(center dot)10(sup 16) ions/cm(sup 2). The nonlinear optical index is large, n(sub 2) > 10(sup (minus)5) esu. All measured quantities show a strong dependence on the implanted ion dose. The source of the nonlinearity, whether electronic or thermal, remains to be more completely determined. 9 refs., 4 figs.