Abstract
We demonstrate a novel electrooptic polarization controller with an inherently unlimited transformation range, which, unlike previously reported schemes of cascaded polarization controllers with limited transformation ranges,1 allows reset-free endless polarization control via simple analog feedback loops. The LiNbO3 transformer, which we previously proposed in Ref. 2, operates with a birefringent single-mode waveguide and is composed of three distributed and periodically interleaved phase retarders: a TE-TM phase shifter driven by a voltage Vp; a first TE—TM mode converter driven by Vc; and a second TE-TM mode converter driven by Vs.
© 1990 Optical Society of America
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