Back to results
US 6,883,351 B2Granted
Method for fabricating a low polarization mode dispersion optical fiber
AssigneeCorning Incorporated
InventorsGeorge E. Berkey, David T. Marlowe, Douglas G. Neilson, Jeffrey C. Nelson
Life of this patent
Estimating the term…
Abstract
The method of fabricating an optical waveguide fiber from a preform having a centerline aperture which includes reducing the pressure in the centerline aperture, then increasing the pressure in the centerline aperture to a pressure in order to improve uniformity, circularity, and/or symmetry around the centerline aperture region.
Claims15
A method of forming a preform for use in making an optical waveguide fiber, the method comprising:
- providing a consolidated preform having an outer surface with an outside diameter and an inner surface with an inside diameter, the inner surface defining a centerline aperture therein;
- exposing the inner surface to a first pressure, less than the pressure at the outer surface, while at least part of the preform is at a first temperature for a time sufficient to contract without fully collapsing the aperture and without pulling on the preform;
- and
- after the aperture is contracted, exposing the inner surface to a second pressure, greater than the first pressure, while at least part of the preform is at a second temperature and for a time sufficient to further contract the aperture.
1 more element
Dependencies are inferred from the claim text.