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

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 A have been obtained.

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