Third harmonic generation from nonconventional MOx-PbO-GaO1.5 (M=Ti,Nb,W) glasses have been measured. The nonlinear susceptibility, χ(3), of these glasses at 0.635 μm are about 30 times higher than that of SiO2 glass at the same wavelength. It has been found that TiO2 is most effective in increasing refractive index and χ(3).
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Miyaji et al. (1992) studied this question.
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