文摘
Third-order nonlinear optical susceptibilities (χp>(3)p>) of thallium–tellurite (Tl2O–TeO2) glasses doped separately with various metal oxides (MOY/X; M = p>22p>Ti(IV), p>30p>Zn(II), p>31p>Ga(III), p>82p>Pb(II) and p>83p>Bi(III)) were investigated using a femtosecond Z-scan technique. Surprisingly, the highest change in refractive index was obtained for M = Ti other than Pb and Bi, which was attributed to the formation of the TeO2/TiO2 glass structure without destruction of the initial three-dimensional network, accounting for a strong dielectric response intrinsic to pure TeO2 glass.