Method, communication apparatus, and communication system
US-2015381284-A1 · Dec 31, 2015 · US
Optical switch, optical switching apparatus
US10129613B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10129613-B2 |
| Application number | US-201715850918-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 21, 2017 |
| Priority date | Dec 26, 2016 |
| Publication date | Nov 13, 2018 |
| Grant date | Nov 13, 2018 |
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Abstract
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An optical switch includes a first optical absorbing layer sensitive to a first light and having a first superlattice structure and a first bandgap; a second optical absorbing layer sensitive to a second light and having a second bandgap smaller than that of the first bandgap; and a barrier layer having a second superlattice structure. The first optical absorbing layer, the second optical absorbing layer, and the barrier layer are arranged in a direction of an axis to form an arrangement with a first band-offset in a conduction band of the first optical absorbing layer, a second band-offset in a conduction band of the barrier layer, and a well in a conduction band of the second optical absorbing layer.
First claim
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What is claimed is: 1. An optical switch comprising: a first optical absorbing layer sensitive to a first light, the first optical absorbing layer including a first superlattice structure and having a first bandgap; a second optical absorbing layer sensitive to a second light, the second optical absorbing layer having a second bandgap smaller than that of the first bandgap; and a barrier layer including a second superlattice structure, the first optical absorbing layer, the second optical absorbing layer, and the barrier layer being arranged in a direction of an axis to form an arrangement, the arrangement forming a first band-offset in a conduction band of the first optical absorbing layer, a second band-offset in a conduction band of the barrier layer, and a well in a conduction band of the second optical absorbing layer. 2. The optical switch according to claim 1 , wherein the first superlattice structure includes an InSb/InAs/GaSb structure. 3. The optical switch according to claim 1 , wherein the second optical absorbing layer has a third superlattice structure, the third superlattice structure including at least one of an InSb/InAs/GaSb/AlSb/GaSb structure or an InSb/InAs/GaSb/AlGaSb/GaSb structure. 4. The optical switch according to claim 1 , wherein the second optical absorbing layer is made of InGaAs. 5. The optical switch according to claim 1 , wherein the second superlattice structure of the barrier layer includes an InSb/InAs/GaSb structure. 6. An optical switching apparatus comprising: an optical switch including a first optical absorbing layer sensitive to a first light, the first optical absorbing layer including a first superlattice structure and having a first bandgap, a second optical absorbing layer sensitive to a second light, the second optical absorbing layer having a second bandgap smaller than that of the first bandgap; and a barrier layer including a second superlattice structure; and a light source for the first light, the light source being optically coupled to the optical switch, wherein the first optical absorbing layer, the second optical absorbing layer, and the barrier layer are arranged in a direction of an axis to form an arrangement, the arrangement forming a first band-offset in a conduction band of the first optical absorbing layer, a second band-offset in a conduction band of the barrier layer, and a well in a conduction band of the second optical absorbing layer. 7. The optical switching apparatus according to claim 6 , further comprising a first optical fiber optically coupling the first light source with the optical switch.
Assignees
Inventors
Classifications
- H04Q11/0003Primary
Details · CPC title
in liquid crystals doped with a pleochroic dye · CPC title
Electricity · mapped topic
1xN switch, i.e. one input and a selectable single output of N possible outputs · CPC title
- G02B6/3594Primary
Characterised by additional functional means, e.g. means for variably attenuating or branching or means for switching differently polarized beams · CPC title
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Frequently asked questions
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- What does patent US10129613B2 cover?
- An optical switch includes a first optical absorbing layer sensitive to a first light and having a first superlattice structure and a first bandgap; a second optical absorbing layer sensitive to a second light and having a second bandgap smaller than that of the first bandgap; and a barrier layer having a second superlattice structure. The first optical absorbing layer, the second optical absor…
- Who is the assignee on this patent?
- Sumitomo Electric Industries
- What technology area does this patent fall under?
- Primary CPC classification H04Q11/0003. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 13 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).