Neelam Berwal, N. Ahlawat, D. Mohan, R. Punia, N. Kishore
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Non-linear optical properties of SiO2 modified Bi2O3-TeO2-B2O3 glass system
In present study, quaternary bismuth borosilicate tellurite glass system with compositions x SiO2-(80-x) Bi2O3-15 B2O3-5TeO2 (x = 0, 5, 10 and 15) has been successfully prepared by melt-quenching technique. The linear refractive index (n0) of prepared glass samples has been observed to decrease with increase in SiO2 content. Third order nonlinear optical properties viz. nonlinear refractive index (n2) and nonlinear absorption coefficient (β) have been estimated by fitting of experimentally observed closed and open aperture Z-scan measurements with theoretical models and found to be dependent on amount of silicate content in studied glass compositions. The third order nonlinear susceptibility (χ(3)) including real and imaginary parts have also been calculated.