Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2011-03-01
2011-03-01
Peng, Charlie (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S123000, C385S124000, C385S125000, C385S126000, C385S127000
Reexamination Certificate
active
07899294
ABSTRACT:
A double-clad optical fiber includes a core, an inner cladding and an outer cladding of silica-based glass. The core may have a radius of less than about 5 μm, a first index of refraction n1and does not contain any active rare-earth dopants. The inner cladding may surround the core and includes a radial thickness of at least about 25 μm, a numerical aperture of at least about 0.25, and a second index of refraction n2such that n2<n1. The relative refractive index percent (Δ%) of the core relative to the inner cladding may be greater than about 0.1%. The outer cladding may surround the inner cladding and include a radial thickness from about 10 μm to about 50 μm and a third index of refraction n3such that n3<n2. The relative refractive index percent (Δ%) of the inner cladding relative to the outer cladding may be greater than about 1.5%.
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Chen Xin
Koh Joohyun
Li Ming-Jun
Corning Incorporated
Peng Charlie
Short Svetlana Z.
Wong Eric
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