High-order-mode filter for semiconductor waveguides
US-9465163-B2 · Oct 11, 2016 · US
Optical waveguide termination having a doped, light-absorbing slab
US10359569B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10359569-B2 |
| Application number | US-201615149457-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 9, 2016 |
| Priority date | May 9, 2016 |
| Publication date | Jul 23, 2019 |
| Grant date | Jul 23, 2019 |
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- Title
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Abstract
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An optical waveguide termination includes a light-receiving inlet for receiving light to be terminated, a rib waveguide extending from the inlet, a doped, light-absorbing slab supporting the rib waveguide for absorbing light from the rib waveguide, and a tip at an end of the rib waveguide. The optical waveguide termination exhibits low back-reflection.
First claim
Opening claim text (preview).
The invention claimed is: 1. An optical waveguide termination comprising: a doped, light-absorbing slab defining a first plane and having a width; a light-receiving inlet of an input ridge waveguide at a first boundary of the slab; a rib waveguide lying in a second plane parallel to the first plane and supported by the slab and extending from the inlet to a tip at an end of the rib waveguide, the width of the rib waveguide being less than the width of the slab; and at least one transition surrounding the rib waveguide and coupling the rib waveguide to the inlet of the input ridge waveguide; wherein the tip is spaced-apart from the boundaries of the slab to allow light to escape therefrom and into the slab and reduce an amount of back-reflection therefrom. 2. The optical waveguide termination of claim 1 wherein the rib waveguide is also doped. 3. The optical waveguide termination of claim 1 wherein the rib waveguide comprises a curved waveguide section supported by the slab. 4. The optical waveguide termination of claim 3 wherein the curved waveguide section comprises a semicircular or a spiral-shaped waveguide section. 5. The optical waveguide termination of claim 1 wherein the rib waveguide and the slab comprise silicon. 6. The optical waveguide termination of claim 5 wherein the rib waveguide and slab are formed by partially etching a silicon layer. 7. The optical waveguide termination of claim 1 wherein the tip is tapered.
Assignees
Inventors
Classifications
Ridge, rib or the like · CPC title
Basic optical elements, e.g. light-guiding paths · CPC title
- G02B6/243Primary
as light absorbers · CPC title
Tapered waveguides, e.g. integrated spot-size transformers (for coupling with fibres G02B6/305) · CPC title
Bends, branchings or intersections · CPC title
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- What does patent US10359569B2 cover?
- An optical waveguide termination includes a light-receiving inlet for receiving light to be terminated, a rib waveguide extending from the inlet, a doped, light-absorbing slab supporting the rib waveguide for absorbing light from the rib waveguide, and a tip at an end of the rib waveguide. The optical waveguide termination exhibits low back-reflection.
- Who is the assignee on this patent?
- Huawei Tech Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B6/243. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 23 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).