G - Physics – 02 – B
Patent
G - Physics
02
B
88/117
G02B 5/30 (2006.01) G02B 27/28 (2006.01) G02F 1/01 (2006.01) G02F 1/035 (2006.01)
Patent
CA 2008377
- 20 - INTEGRATED-OPTIC ENDLESS POLARIZATION TRANSFORMER Abstract Cascadability and simplicity of design and operation are primary attributes of a novel electrooptic polarization transformer for reset-free endless polarization control that allows general polarization transformations from any arbitrarily varying input and into any arbitrarily varying output polarization by producing adjustable elliptical birefringence of constant total phase retardation in a single-mode waveguide. Here, a particular transformation is obtained by adjusting the azimuth of linear birefringence and the ratio of linear to circular birefringence. In this integrated-optic realization, the endless polarization transformer includes at least one cascadable transformer section comprising a first TE Image TM mode converterfollowed by a first TE/TM phase shifter followed by a a second TE Image TM mode converter and a second TE/TM phase shifter. The sections are formed over a birefringent waveguide capable of supporting propagation of TE and TM optical signal modes.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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