Integrated-Optic Polarization Transformer for Reset-Free Endless Polarization Control.

We propose and analyze a novel waveguide polarization transformer for reset-free endless polarization control. The electrooptic polarization transformer employs a multiple cascade of alternating TE->TM polarization converter and TE/TM phase shifter sections in a birefringent crystal, such as LiNbO sub 3 or LiTaO sub 3, and requires only three independent drive voltages. It is capable of transforming any arbitrarily varying input polarization into any desired output polarization without ever requiring a reset cycle.