Multicore fiber
US-9223083-B2 · Dec 29, 2015 · US
Multicore fiber
US9008479B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9008479-B2 |
| Application number | US-201313846127-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 18, 2013 |
| Priority date | Dec 9, 2010 |
| Publication date | Apr 14, 2015 |
| Grant date | Apr 14, 2015 |
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Abstract
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A multicore fiber has a plurality of cores; and a clad which surrounds an outer peripheral surface of each of the cores, and at least one of the cores is spirally arranged such that the core rotates around a center axis of the clad. By arranging the cores in this way, it is possible to prevent crosstalk between specific cores from escalating even when the multicore fiber is disposed in a bent state.
First claim
Opening claim text (preview).
The invention claimed is: 1. A multicore fiber comprising: a plurality of cores; and a clad surrounding an outer peripheral surface of each of the cores, wherein at least one of the cores is arranged spirally such that the core rotates around a center axis of the clad, and wherein the spiral core and a core adjacent to the spiral core comprise different refractive indices from each other. 2. The multicore fiber according to claim 1 , wherein the spiral core comprises a section in which a pitch at which the core rotates around the center axis of the clad changes. 3. The multicore fiber according to claim 2 , wherein the pitch of the spiral core changes at all sections. 4. The multicore fiber according to claim 1 , wherein the spiral core repeats rightward rotation and leftward rotation around the center axis of the clad. 5. The multicore fiber according to claim 4 , wherein an average length of a section for the rightward rotation and an average length of a section for leftward rotation of the spiral core are equal. 6. The multicore fiber according to claim 5 , wherein a length of each section for the rightward rotation and a length of each section for leftward rotation of the spiral core are not fixed. 7. The multicore fiber according to claim 5 or 6 , wherein two or more cores are spirally arranged such that the cores rotate around the center axis of the clad, and the spiral cores each rotate at a pitch equal to or more than an average 1 time/m on average around the center axis of each clad. 8. The multicore fiber according to claim 7 , wherein the spiral cores each rotate at a pitch equal to or more than 4 time/m on average around the center axis of the clad. 9. The multicore fiber according to claim 1 , wherein each of the core allows propagation of light in a single mode with respect to a wavelength of use. 10. The multicore fiber according to claim 1 , wherein the spiral core and the core adjacent to the spiral core comprise different diameters. 11. The multicore fiber according to claim 1 or 10 , wherein the two or more cores are arranged at equal intervals along an outer peripheral direction of the clad, and are spirally arranged such that the cores rotate around the center axis of the clad in an identical direction. 12. The multicore fiber according to claim 11 , wherein one of the cores is arranged along the center axis of the clad.
Assignees
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Classifications
- G02B6/02042Primary
Multicore optical fibres · CPC title
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Frequently asked questions
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- What does patent US9008479B2 cover?
- A multicore fiber has a plurality of cores; and a clad which surrounds an outer peripheral surface of each of the cores, and at least one of the cores is spirally arranged such that the core rotates around a center axis of the clad. By arranging the cores in this way, it is possible to prevent crosstalk between specific cores from escalating even when the multicore fiber is disposed in a bent s…
- Who is the assignee on this patent?
- Fujikura Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B6/02042. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 14 2015 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).