Low modal birefringent waveguides and method of fabrication

Details Low modal birefringent waveguides and method of fabrication Low modal birefringent waveguides and method of fabrication

2006-12-05

2006-12-05

Pak, Sung (Department: 2874)

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

C385S130000, C385S129000

Reexamination Certificate

active

07146087

ABSTRACT:
The illustrative embodiment of the invention is a surface waveguide having low modal birefringence. The surface waveguide has a composite guiding region that is sandwiched by a lower cladding layer and an upper cladding layer, wherein the cladding layers serve to confine propagating light to the composite guiding region. In accordance with the illustrative embodiment, the composite guiding region is structured so that it exhibits a balanced stress configuration, wherein the stress in the direction that aligns with the TEpolarization mode is substantially equal to the stress in the direction that aligns with the TMpolarization mode. The balanced stress configuration results in a surface waveguide that exhibits very low modal birefringence.

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