Chalcogenide doping of oxide glasses
AssigneeCorning Incorporated
InventorsAdam J. G. Ellison, Rostislav R. Khrapko
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Abstract
The present invention relates to a glass article for use as an optical waveguide fiber and more particularly to an optical waveguide fiber, the core of which is doped with a chalcogenide element to significantly increase the refractive index of the core. The subject of this invention is novel doped silica core compositions wherein a portion of the oxygen in the silica is replaced with either sulfur, selenium or tellurium using plasma enhanced chemical vapor deposition (PECVD). These compositions are designed to have higher refractive indices than silica, low coefficients of expansion, high optical transparency, and appropriate viscosity and softening points to make them ideal candidates for use as optical waveguide fibers.
Claims15
A method of making an optical waveguide preform containing sulfur therein, comprising:
- igniting a plasma inside a substrate tube in the presence of a chalcogenide containing precursor compound and a silica forming precursor compound, under conditions which are effective to deposit and thereby depositing a glassy deposit comprised of silica doped with said chalcogenide material on the inside of said tube.
Dependencies are inferred from the claim text.