Refractive-index profiles and propagation losses of Er~(3+)-doped tungsten tellurite glass waveguide by Ag~+-Na~+ ion-exchange

摘要

The planar waveguide of 12Na_2O centre dot 35WO_3 centre dot 53TeO_2 centre dot Er_2O_3 glass (in mol percent) was prepared by Ag~+-Na~+ ion-exchange at 330 deg C for 5 h. The effective mode indices and propagation losses of the waveguide at the wavelengths of 473, 632.8, 983.1 and 1548 nm for TE and TM modes were measured by means of a prism coupler technique. The results were compared with those of a planar waveguide of the tungsten tellurite glass without Er~(3+) ions. Especially, the propagation losses of ion-exchanged tellurite glass waveguides were estimated for the first time to the best of our knowledge.