Optical device having diffraction gratings coupling guided...

Details Optical device having diffraction gratings coupling guided... Optical device having diffraction gratings coupling guided...

2008-02-05

2009-08-11

Song, Sarah (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

Reexamination Certificate

active

07574083

ABSTRACT:
An optical waveguide structure formed over a substrate defines an optical waveguide for guiding light along a direction parallel to the substrate surfaces, and biasing a light intensity distribution of transverse modes of guided wave toward a first side of the optical waveguide path. A main diffraction grating is disposed at least on a second side opposite to the first side, and coupled with the guided wave propagating along the optical waveguide. A subsidiary diffraction grating is disposed on the first side, and diffracts the guided wave coupled with the main diffraction grating and propagating along the optical waveguide, to a direction different from an extending direction of the optical waveguide.

REFERENCES:
patent: 2008/0069496 (2008-03-01), Tolstikhin et al.
patent: 2003-152273 (2003-05-01), None

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