Patent ID: 7484387
Filing Date: 2009-02-03
Classification: B82Y,C03B,C03C,G02B

Abstract:
1. A method of making an optical fiber having a plurality of voids extending along the fiber axis, comprising the steps of: preparing a preform having a plurality of voids whose cross-sectional areas are uniform along the preform axis, the preform having an initial area fraction of the plurality of voids that is a ratio of a total area of the plurality of voids to cross-sectional area; drawing the optical fiber from the preform with a fiber drawing furnace, the drawing step includes determining a resulting area fraction of the plurality of voids in the drawn optical fiber, the drawing step comprising the sub steps of: performing feedback control of pressure in the plurality of voids, a furnace temperature and a time duration of the fiber in the furnace during the drawing, based on the resulting area fraction.