Refractive index of glasses in the PbO-ZnO-P2O5 system

Abstract

Ten glasses of PbO-ZnO-P2O5 system have been prepared. The experimental values of refractive index of these glasses were compared with the theoretical ones calculated using (i) Lorentz-Lorenz equation, (ii) Virtual Crystal Approximation (VCA), and (iii) Effective Medium Theory (EMT). It is shown that the refractive index determined by EMT and VCA follows the experimental values of refractive index quite well and these methods can be used for prediction of the refractive index values in PbO-ZnO-P2O5 system glasses. It is also supposed that the nonlinear refractive index value could reach the value n2[esu]~5.4x10-12 for glasses with the linear refractive index n 1.8.