Z-scan measurements of the third-order optical nonlinearities and linear optical properties of 70TeO2 - 5M O - 10P2O5 - 10ZnO - 5PbF2 glasses doped with Er3+ ions modified by transition metals
Source abstract
Abstract
Abstract The two photon absorption (TPA) coefficient (β), the nonlinear refractive index ( n 2 ), and the third order nonlinear optical susceptibility ( χ 3 > ) of tellurium dioxide glasses were investigated using the absorption spectra, normalized transmission, and Z-scan methods. We studied the influence of different transition metals, with and without the rare earth ion Er3+, on the nonlinear properties of these glasses. The experimental results show that ( n 2 ) and (β) are the highest for the glass consisting of cadmium oxide doped with rare earth ions. Consequently, the real and imaginary part of the third-order nonlinear optical susceptibility ( χ 3 > ) is the highest for these materials. Moreover, the presence of Er3+ increased the NLO coefficients the all the examined samples. The Z-scan result confirms, the glasses exhibit self-focusing effects and the sign of the refractive nonlinearity is positive.
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Research context
OpenAlex topics: Nonlinear Optical Materials Studies · Glass properties and applications · Phase-change materials and chalcogenides
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