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US 12,459,853 B2Granted
Multi-core optical fiber preform, multi-core optical fiber preform production method, and multi-core optical fiber production method
AssigneeFujikura Ltd.
InventorsRyohei Fukumoto, Katsuhiro Takenaga
Life of this patent
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Abstract
A multi-core optical fiber preform includes: a rod-shaped main cladding body having one or more main inner holes; main core rods inserted into the one or more main inner holes; and a tip continuously-installed portion disposed at one end of the rod-shaped main cladding body and including a glass rod having no core rod or having one core rod.
Claims9
A multi-core optical fiber preform comprising:
- a rod-shaped main cladding body having one or more main inner holes;
- main core rods inserted into the one or more main inner holes;
- and
- a tip continuously-installed portion disposed at one end of the rod-shaped main cladding body and including a glass rod having a single core rod.
1 more element
A multi-core optical fiber preform comprising:
- a rod-shaped main cladding body having one or more main inner holes;
- main core rods inserted into the one or more main inner holes;
- and
- a tip continuously-installed portion that:
- is disposed at one end of the rod-shaped main cladding body, and includes:
- a solid constant diameter portion having a constant outer diameter;
- and
- a solid reduced diameter portion that is reduced in diameter from a tip of the solid constant diameter portion and protrudes from the tip, wherein
- the solid constant diameter portion and the solid reduced diameter portion include a glass rod having no core rod or having a single core rod.
6 more elements
Dependencies are inferred from the claim text.