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US 2015/0316714 A1Published application
Multi-core amplification optical fiber
AssigneeFurukawa Electric Co., Ltd.
InventorsYukihiro TSUCHIDA, Yu MIMURA
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Abstract
A multi-core amplification optical fiber includes: a plurality of core portions doped with a rare-earth element; an inner cladding portion positioned at a periphery of the plurality of core portions, having a refractive index lower than a refractive index of the plurality of core portions, in which a first hole is formed; and an outer cladding layer positioned at a periphery of the inner cladding portion, having a refractive index lower than the refractive index of the inner cladding portion.
Claims6
A multi-core amplification optical fiber comprising:
- a plurality of core portions doped with a rare-earth element;
- an inner cladding portion positioned at a periphery of the plurality of core portions, having a refractive index lower than a refractive index of the plurality of core portions, in which a first hole is formed;
- and
- an outer cladding layer positioned at a periphery of the inner cladding portion, having a refractive index lower than the refractive index of the inner cladding portion.
1 more element
A multi-core amplification optical fiber comprising:
- a plurality of core portions doped with a rare-earth element;
- and
- a cladding portion positioned at a periphery of the plurality of core portions, having a refractive index lower than a refractive index of the plurality of core portions, in which a first hole and a plurality of second holes disposed so as to surround the plurality of core portions and the first hole are formed.
Dependencies are inferred from the claim text.