Optical waveguides – Optical fiber waveguide with cladding – Utilizing nonsolid core or cladding
Reexamination Certificate
2007-11-06
2007-11-06
Healy, Brian M. (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing nonsolid core or cladding
C385S123000, C385S095000, C385S122000, C385S141000
Reexamination Certificate
active
11178477
ABSTRACT:
A hole-assisted holey fiber is provided. The holey fiber includes a core region; a cladding region around the core region, and a plurality of holes in the cladding region around the core region. The core region has a higher refractive index than that of the cladding region. The holes form an inner hole layer and an outer hole layer, and the inner hole layer has the same number of holes as the number of the holes in the outer hole layer. The outer layer holes are provided in locations in which inner holes are absent when viewed from the center of the core region, and holes defining the same layer have the same diameter. A distance Λ1from a center of the core region to a center of an inner hole and a distance Λ2from the center of the core region to a center of an outer hole satisfy the relationship Λ1<Λ2, and a diameter d1of an inner hole and a diameter d2of an outer hole satisfy the relationship d1≧d2.
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Aikawa Kazuhiko
Guan Ning
Himeno Kuniharu
Izoe Katsuaki
Takenaga Katsuhiro
Fujikura Ltd.
Healy Brian M.
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