Deep-shallow optical radiation filters
AssigneeHuawei Technologies Co., Ltd.
InventorsDirk Taillaert, Joost Brouckaert
Life of this patent
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Abstract
An optical coupler for processing radiation is described. The optical coupler comprises a first deep-shallow waveguide and a second deep-shallow waveguide for guiding radiation in a propagation direction. Each of the deep-shallow waveguides is a waveguide comprising a shallow etched portion and an unetched portion having a width substantially constant along the propagation direction. The width of the shallow etched portion is substantially larger than the width of the unetched portion. The shallow etched portion of the first deep-shallow waveguide and the shallow etched portion of the second deep-shallow waveguide are arranged sufficiently close for coupling radiation from the first deep-shallow waveguide to the second deep-shallow waveguide.
Claims14
An optical coupler for processing radiation, the optical coupler comprising:
- a first deep-shallow waveguide, and
- a second deep-shallow waveguide for guiding radiation in a propagation direction,
- wherein each of the first and second deep-shallow waveguides comprises:
- an unetched portion,
- a first shallow etched portion at a first side of the unetched portion,
- a second shallow etched portion at a second side of the unetched portion, and
- a deep etched portion next to the second shallow etched portion,
- wherein the unetched portion and the first and second shallow etched portions each have a width substantially constant along the propagation direction,
- wherein the first shallow etched portion of the first deep-shallow waveguide and the first shallow etched portion of the second deep-shallow waveguide are in direct contact with one another,
- wherein the width of the first and second shallow etched portions of the first and second deep-shallow waveguides are substantially larger than the width of the unetched portion of the first and second deep-shallow waveguides, respectively, and
- wherein the unetched portion of the first deep-shallow waveguide and the unetched portion of the second deep-shallow waveguide are arranged sufficiently close for coupling radiation from the first deep-shallow waveguide to the second deep-shallow waveguide.
An optical device for processing radiation, the optical device comprising:
- an optical coupler comprising:
- a first deep-shallow waveguide, and
- a second deep-shallow waveguide for guiding radiation in a propagation direction, wherein each of the first and second deep-shallow waveguides includes:
- an unetched portion,
- a first shallow etched portion at a first side of the unetched portion,
- a second shallow etched portion at a second side of the unetched portion, and
- a deep etched portion next to the second shallow etched portion, wherein the unetched portion and the first and second shallow etched portions have a width substantially constant along the propagation direction,
- wherein the first shallow etched portion of the first deep-shallow waveguide and the first shallow etched portion of the second deep-shallow waveguide are in direct contact with one another,
- wherein the width of the first and second shallow etched portions of the first and second deep-shallow waveguides are substantially larger than the width of the unetched portion of the first and second deep-shallow waveguides, respectively, and
- wherein the unetched portion of the first deep-shallow waveguide and the unetched portion of the second deep-shallow waveguide are arranged sufficiently close for coupling radiation from the first deep-shallow waveguide to the second deep-shallow waveguide.
Dependencies are inferred from the claim text.