Method and apparatus for transmitting indoor context information
US-2015138019-A1 · May 21, 2015 · US
Optical waveguide element and optical modulator using the same
US9939709B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9939709-B2 |
| Application number | US-201615236633-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 15, 2016 |
| Priority date | Aug 21, 2015 |
| Publication date | Apr 10, 2018 |
| Grant date | Apr 10, 2018 |
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Abstract
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Disclosed herein is an optical waveguide element that includes a substrate and a waveguide layer formed on the substrate and comprising lithium niobate. The waveguide layer has a slab part having a predetermined thickness and a ridge part protruding from the slab part. The maximum thickness of the slab part is 0.05 times or more and less than 0.4 times a wavelength of a light propagating in the ridge part.
First claim
Opening claim text (preview).
What is claimed is: 1. An optical waveguide element comprising: a substrate; and a waveguide layer formed on the substrate and comprising lithium niobate, wherein the waveguide layer has a slab part having a predetermined thickness and a ridge part protruding from the slab part, the slab part having inclining parts located at both sides of the ridge part, the inclining parts being gradually thinned away from the ridge part, and wherein a maximum thickness of the slab part is 0.05 times or more and less than 0.4 times a wavelength of a light propagating in the ridge part. 2. The optical waveguide element as claimed in claim 1 , wherein a width of the ridge part is 0.1 times or more and less than 1.0 time the wavelength of the light. 3. The optical waveguide element as claimed in claim 1 , wherein a thickness of the ridge part is 0.5 times or more and less than 2.0 times the wavelength of the light. 4. The optical waveguide element as claimed in claim 1 , wherein sides of the ridge part are inclined by 70° or more. 5. The optical waveguide element as claimed in claim 1 , wherein a maximum thickness of the inclining parts is 0.1 times or more and less than 0.37 times the wavelength of the light. 6. The optical waveguide element as claimed in claim 1 , wherein a width of the ridge part is 0.3 times or more and less than 1.2 times the wavelength of the light.
Assignees
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Classifications
Physics · mapped topic
Basic optical elements, e.g. light-guiding paths · CPC title
LiNbO3, LiTaO3 · CPC title
Polarisation dependent · CPC title
- G02F1/2257Primary
the optical waveguides being made of semiconducting material · CPC title
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- What does patent US9939709B2 cover?
- Disclosed herein is an optical waveguide element that includes a substrate and a waveguide layer formed on the substrate and comprising lithium niobate. The waveguide layer has a slab part having a predetermined thickness and a ridge part protruding from the slab part. The maximum thickness of the slab part is 0.05 times or more and less than 0.4 times a wavelength of a light propagating in the…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification G02F1/2257. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 10 2018 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).