Optical waveguide device for polarization rotation

Details Optical waveguide device for polarization rotation Optical waveguide device for polarization rotation

1991-02-19

1992-08-18

Ullah, Akm E.

Optical waveguides

Directional optical modulation within an optical waveguide

Electro-optic

385 9, 385 14, G02B 610

Patent

active

051406543

ABSTRACT:
An optical waveguide device for polarization rotation comprises a substrate, a waveguide path arranged on the substrate, a mode converting element arranged at an intermediate region of the waveguide path, and a polarization rotating element arranged at a location in the waveguide path between a place where light is incident and the mode converting element. The mode converting element includes a phase shifter for relatively shifting a phase between TE and TM components of light transmitted through the waveguide path, in response to an applied voltage, and also includes a mode converter for converting modes between the TE and TM components. The polarization rotating element rotates a polarization plane of the light transmitted through the waveguide path by (90+180 .times.n) degrees, where n is zero or an integer.

REFERENCES:
patent: 4153328 (1979-05-01), Wang
patent: 4384760 (1983-05-01), Alferness
patent: 4966431 (1990-10-01), Heismann
Rod C. Alferness, "Electrooptic Guided-Wave Device for General Polarization Transformations," IEEE Journal of Quantum Elecronics, vol. QE-17, No. 6, Jun. 1981, pp. 965-969.

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