Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Reexamination Certificate
2007-04-20
2009-10-20
Wood, Kevin S (Department: 2874)
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
C385S123000, C065S398000
Reexamination Certificate
active
07606460
ABSTRACT:
An optical fiber comprises a center core and a cladding located at an outer periphery of the core, wherein the core comprises at least one codoped layer made from silica glass doped with germanium and fluorine, and at least one lower-concentration codoped layer made from silica glass doped with germanium, or silica glass that is doped with germanium and fluorine wherein an amount of fluorine in the lower-concentration codoped layer is smaller than an amount of fluorine in the codoped layer.
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Himeno Kuniharu
Matsuo Shoichiro
Tanigawa Shoji
Fujikura Ltd.
Sughrue & Mion, PLLC
Wood Kevin S
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