Optical fiber and laser device
US-2021057866-A1 · Feb 25, 2021 · US
Optical fiber and laser device
US11656402B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11656402-B2 |
| Application number | US-201816958332-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 27, 2018 |
| Priority date | Dec 28, 2017 |
| Publication date | May 23, 2023 |
| Grant date | May 23, 2023 |
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- Title
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Abstract
Official abstract text for this publication.
An optical fiber includes a core that propagates a light that includes a wavelength equal to or larger than 1000 nm and equal to or smaller than 1100 nm. The light propagates in the core at least in an LP01 mode and an LP11 mode. A difference between a propagation constant of the light in the LP01 mode and a propagation constant of the light in the LP11 mode is 1735 rad/m or larger and 4000 rad/m or smaller.
First claim
Opening claim text (preview).
The invention claimed is: 1. An optical fiber comprising: a core that propagates a light that includes a wavelength equal to or larger than 1000 nm and equal to or smaller than 1100 nm, wherein the light propagates in the core at least in an LP01 mode and an LP11 mode, a difference between a propagation constant of the light in the LP01 mode and a propagation constant of the light in the LP11 mode is 1735 rad/m or larger and 3000 rad/m or smaller, a diameter of the core is 20 μm or larger and 29 μm or smaller, and a relative refractive index difference of the core with respect to a clad is 0.1% or larger and 0.2% or smaller. 2. The optical fiber according to claim 1 , wherein the light includes a wavelength of 1060 nm that propagates in the core at least in the LP01 mode and the LP11 mode. 3. The optical fiber according to claim 1 , wherein the difference between the propagation constant of the light in the LP01 mode and the propagation constant of the light in the LP11 mode is smaller than 1850 rad/m. 4. The optical fiber according to claim 1 , wherein a theoretical cutoff wavelength of the light in the LP11 mode is longer than 1635 nm. 5. The optical fiber according to claim 1 , wherein a theoretical cutoff wavelength of light in an LP02 mode is 1760 nm or shorter. 6. The optical fiber according to claim 5 , wherein the theoretical cutoff wavelength of the light in the LP11 mode is longer than 1760 nm. 7. The optical fiber according to claim 1 , wherein a theoretical cutoff wavelength of the light in an LP02 mode is shorter than 1513 nm. 8. The optical fiber according to claim 1 , wherein ytterbium is added to the core. 9. A laser device comprising the optical fiber according to claim 1 . 10. The optical fiber according to claim 1 , wherein the core has a stepwise refractive index profile. 11. An optical fiber comprising: a core that propagates a light that includes a wavelength equal to or larger than 1000 nm and equal to or smaller than 1100 nm, wherein the light propagates in the core at least in an LP01 mode and an LP11 mode, a difference between a propagation constant of the light in the LP01 mode and a propagation constant of the light in the LP11 mode is larger than 1750 rad/m and smaller than 1850 rad/m. 12. An optical fiber comprising: a core that propagates a light that includes a wavelength equal to or larger than 1000 nm and equal to or smaller than 1100 nm, wherein the light propagates in the core at least in an LP01 mode and an LP11 mode, a difference between a propagation constant of the light in the LP01 mode and a propagation constant of the light in the LP11 mode is 1735 rad/m or larger and 4000 rad/m or smaller, a theoretical cutoff wavelength of the light in the LP11 mode is longer than 1635 nm. 13. The optical fiber according to claim 12 , wherein the theoretical cutoff wavelength of the light in the LP11 mode is longer than 1760 nm. 14. The optical fiber according to claim 12 , wherein a theoretical cutoff wavelength of the light in an LP02 mode is shorter than 1513 nm. 15. A laser device comprising: the optical fiber according to claim 12 . 16. An optical fiber comprising: a core that propagates a light that includes a wavelength equal to or larger than 1000 nm and equal to or smaller than 1100 nm, wherein the light propagates in the core at least in an LP01 mode and an LP11 mode, a difference between a propagation constant of the light in the LP01 mode and a propagation constant of the light in the LP11 mode is 1735 rad/m or larger and 4000 rad/m or smaller, a theoretical cutoff wavelength of the light in an LP02 mode is 1760 nm or shorter. 17. The optical fiber according to claim 16 , wherein a theoretical cutoff wavelength of the light in the LP11 mode is longer than 1635 nm. 18. The optical fiber according to claim 16 , wherein the theoretical cutoff wavelength of the light in the LP11 mode is longer than 1760 nm. 19. The optical fiber according to claim 16 , wherein a theoretical cutoff wavelength of the light in an LP02 mode is shorter than 1513 nm. 20. A laser device comprising: the optical fiber according to claim 16 .
Assignees
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Classifications
Single-mode emission · CPC title
having a specific amplification band · CPC title
arranged - - · CPC title
Housings; Packages · CPC title
ytterbium · CPC title
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Frequently asked questions
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- What does patent US11656402B2 cover?
- An optical fiber includes a core that propagates a light that includes a wavelength equal to or larger than 1000 nm and equal to or smaller than 1100 nm. The light propagates in the core at least in an LP01 mode and an LP11 mode. A difference between a propagation constant of the light in the LP01 mode and a propagation constant of the light in the LP11 mode is 1735 rad/m or larger and 4000 rad…
- Who is the assignee on this patent?
- Fujikura Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B6/02023. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 23 2023 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).