Method for manufacturing a preform for optical fibers
US-11780762-B2 · Oct 10, 2023 · US
Optical fiber preform and method for manufacturing such optical fiber preform from a primary preform
US11046608B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11046608-B2 |
| Application number | US-201314911522-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 13, 2013 |
| Priority date | Aug 13, 2013 |
| Publication date | Jun 29, 2021 |
| Grant date | Jun 29, 2021 |
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- Title
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Abstract
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The invention relates to an optical fiber preform ( 20 ) comprising a primary preform ( 21 ) and one or more purified silica-based overclad layers ( 22 ) surrounding said primary preform ( 21 ), the purified silica-based overclad layers ( 22 ) comprising lithium and aluminium, and having a ratio between lithium concentration [Li] and aluminium concentration [Al] satisfying the following inequality: 1×10 −3 ≤[Li]/[Al]≤20×10 −3 .
First claim
Opening claim text (preview).
The invention claimed is: 1. An optical fiber preform comprising a primary preform and at least one purified silica-based overclad layer surrounding the primary preform, the at least one purified silica-based overclad layer comprising lithium and aluminium, wherein the at least one purified silica-based overclad layer has a ratio between lithium concentration [Li] and aluminium concentration [Al] satisfying the following inequality: 4×10 −3 ≤[Li]/[Al]≤10×10 −3. 2. The optical fiber preform according to claim 1 , wherein the ratio between lithium concentration [Li] and aluminium concentration [Al] satisfies the following inequality: 4×10 −3 ≤[Li]/[Al]≤6×10 −3. 3. An optical fiber made from the optical fiber preform according to claim 1 .
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Classifications
- C03B37/01291Primary
by progressive melting, e.g. melting glass powder during delivery to and adhering the so-formed melt to a target or preform, e.g. the Plasma Oxidation Deposition [POD] process · CPC title
Inorganic coatings · CPC title
containing alkali metals · CPC title
containing aluminium (C03C2201/36 takes precedence) · CPC title
Pure silica glass, e.g. pure fused quartz · CPC title
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- What does patent US11046608B2 cover?
- The invention relates to an optical fiber preform ( 20 ) comprising a primary preform ( 21 ) and one or more purified silica-based overclad layers ( 22 ) surrounding said primary preform ( 21 ), the purified silica-based overclad layers ( 22 ) comprising lithium and aluminium, and having a ratio between lithium concentration [Li] and aluminium concentration [Al] satisfying the following inequal…
- Who is the assignee on this patent?
- Draka Comteq Bv
- What technology area does this patent fall under?
- Primary CPC classification C03B37/01291. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 29 2021 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).