Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2008-01-08
2008-01-08
Font, Frank G. (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
C385S124000, C385S125000, C385S126000, C385S127000, C385S128000, C065S385000, C065S411000, C065S435000
Reexamination Certificate
active
07317856
ABSTRACT:
Provided is a method of manufacturing an optical fiber preform from which an optical fiber having the desired characteristics can easily be produced. The method comprises the steps of: (1) preparing an intermediate preform for manufacturing an optical fiber preform; (2) measuring a refractive index profile in a radial direction at each of a plurality of positions in the longitudinal direction of the intermediate preform; (3) demarcating the outer diameter shape of the intermediate preform based on the result of the step of measuring the refractive index profile so that an optical fiber preform can be manufactured such that an optical fiber having the desired characteristics may be produced from the optical fiber preform; (4) elongating the outer periphery of the intermediate preform so that the outer diameter shape may be formed as demarcated in the step of demarcating the outer diameter shape; and (5) drawing, so as to have a substantially constant outer diameter, the intermediate preform that has been subjected to the grinding step.
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Hirano Masaaki
Makihara Kazumasa
Nakanishi Tetsuya
Blevins Jerry Martin
Font Frank G.
McDermott Will & Emery LLP
Sumitomo Electric Industries Ltd.
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