公开(公告)号：US20220106221A1

公开(公告)日：2022-04-07

申请号：US17490407

申请日：2021-09-30

Applicant: CORNING INCORPORATED

Inventor： John Michael Jewell ,  Hoon Kim ,  Michael Thomas Prezioso

IPC: C03B37/029 ,  C03B37/03 ,  C01B32/21 ,  C04B35/56 ,  C04B35/622

Abstract: A muffle for an optical fiber draw furnace. The muffle including an inner surface and an outer surface, the inner surface forming an inner cavity. A protective coating is disposed on the inner surface, the protective coating having a melting point of about 1850° C. or greater. Furthermore, an absolute difference between a coefficient of thermal expansion of the protective coating and a coefficient of thermal expansion of a material of the muffle is 2.0 ppm/° C. or less over a temperature range from 25° C. to 1000° C.

公开(公告)号：US20230159372A1

公开(公告)日：2023-05-25

申请号：US17981730

申请日：2022-11-07

Applicant: CORNING INCORPORATED

Inventor： Tammy Michelle Hoffmann ,  Nikolaos Pantelis Kladias ,  Michael Thomas Prezioso

IPC: C03B37/029 ,  C03B37/027

CPC classification number: C03B37/029 ,  C03B37/02718 ,  C03B2205/42

Abstract: An optical fiber forming apparatus comprises: a draw furnace; a tube that extends into the passageway of the draw furnace; and a cooling device at an outlet of the tube, the cooling device comprising: one or more bodies having a top surface and an opposing bottom surface, an opening within the body extending from the top surface through the body to the bottom surface, wherein the opening is configured to pass an optical fiber through the body, and one or more gas outlets within the body configured to direct gas to contact the optical fiber as it passes through the opening.