Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Reexamination Certificate
2007-04-12
2008-10-21
Wood, Kevin S (Department: 2874)
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
C385S123000
Reexamination Certificate
active
07440673
ABSTRACT:
A radiation resistant single-mode optical fiber has a core and a cladding, each made of fluorine-doped silica glass, in which a chlorine concentration of the core is at least 0.01 ppm, a relative refractive index difference of the core based on the refractive index for silica is between −0.30% and −0.10%, a relative refractive index difference of the core based on the refractive index for the cladding is between 0.3% and 0.5%, a cutoff wavelength is 1.27 μm or below, and a bending loss at a wavelength of 1.3 μm and a bending diameter of 20 mm is 0.5 dB/m or less.
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Aikawa Kazuhiko
Izoe Katsuaki
Kudoh Manabu
Shamoto Naoki
Tsumanuma Takashi
Fujikura Ltd.
Sughrue & Mion, PLLC
Wood Kevin S
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