Manufacturing method for preform of multi-core fiber and manufacturing method for multi-core fiber
US11820695B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Mar 16, 2021 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Jan 5, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02042
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A manufacturing method includes forming one or more first holes in a cladding rod, inserting a first glass rod into each of the one or more first holes, heating the cladding rod together with the inserted first glass rod to integrate the first glass rod and the cladding rod and to form an intermediate preform, forming one or more second holes in the intermediate preform, inserting a second glass rod into each of the one or more second holes, and heating the intermediate preform together with the inserted second glass rod to integrate the second glass rod and the intermediate preform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.