| Summary: | The nonlinear refractive index and absoption of erbium oxide doped tellurite based glass have been studied. A series of erbium oxide doped tellurite glass denoted as Er-Te glass with chemical composition of 0.47TeO2 + 0.2B2O3 + 0.29ZnO + 0.04Er2O3 were fabricated via conventional melt quenching method. 0.04 mol fraction of erbium oxide in tellurite glass was chosen as it gives the optimum results for glass stability and optical nonlinearity. The Z-scan method was used to investigate third-order optical nonlinearity. The negative nonlinear refractive index of Er-Te glass has been discovered. The polarizability of tellurite glass and the significant effect of two-photon absorption are responsible for the large number of nonlinear refractive index (TPA). Based on these results, the studied glass is ideal as a medium in nonlinear optical fiber. Thus, the studied glass materials might be useful in photonic applications. © 2024 Author(s).
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