Corning Incorporated

Jitendra Balakrishnan

Pushkar Tandon

Dana Craig Bookbinder

Steven Akin Dunwoody

Sonya Marie Raney

Samir Khanna

Chukwuemeka Benneth Onuh

Chukwuemeka B Onuh

According to an embodiment of the invention a method of manufacturing optical fiber cane comprises the steps of: (i) providing a core rod manufactured of relatively low viscosity glass; (ii) depositing SiObased soot around the core rod to form a soot preform, the soot being of relatively high viscosity material such that the softening point of the low viscosity glass is at least 200&#xb0; C. lower than the viscosity of the high viscosity outer core region; and (iii) consolidating the soot of the soot preform by exposure to hot zone at temperatures of 1000&#xb0; C.-1600&#xb0; C. The soot is consolidated by heating the outer portion of the soot preform at a relatively fast heating rate, the heating rate being sufficient to densify the soot, so as to render the densified material with enough rigidity to confine the heated core rod and to prevent the heated core rod from puddling.

Reduction of optical fiber cane/preform deformation in consolidation

A method for deposition glass soot for making an optical fiber preform. A fuel and a glass precursor are flowed to a burner flame forming glass soot which is deposited onto a glass target. By first depositing an insulating layer of glass soot with a low velocity burner flame, the amount of water which may be adsorbed into the surface of the glass target can be reduced. Thereafter, the flame velocity may be increased to increase the deposition rate of the glass soot without significantly increasing the concentration of water incorporated into the glass target.

Method of depositing glass soot

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Ithaca, NY, United States of America

Jitendra Balakrishnan