Efficient waveguide electro-optic TE⇄TM mode converter/wavelength filter

Abstract

We report the first demonstration of efficient phase-matched waveguide electro-optic polarization conversion. Using a strip Ti-diffused lithium niobate waveguide and periodic electrodes, we have achieved TE⇄TM conversion efficiency in excess of 99% with an applied voltage of 13 V. The conversion efficiency is strongly wavelength selective; filter bandwidths between 4.5 and 15 Å have been obtained.