Evaluation of losses and group effective refractive index of Er3+:Ti:LiNbO3 optical waveguides

Abstract

Abstract:In this paper, we report some experimental results concerning several types of loss measurements of Er 3+ :Ti:LiNbO 3 optical waveguides by using optical methods. Using the Fabry-Pérot interferometry method, we evaluated the attenuation coefficient of an optical waveguide resonator for a laser radiation having λ = 1 55 µm. We also evaluated the insertion losses, polarization dependent losses, and coupling with external losses. Additionally, from the transmitted spectra of the symmetrical monomode Fabry-Pérot optical waveguide resonator, we were able to evaluate the value of the group effective refractive index. 32.90.+a, 41.20.-q, 42.82.-m, 03.67.-a, 42.50.-p, 78.66.-w PACS (2008): Keywords:Er 3+