Invention Application
- Patent Title: LOW ATTENUATION FIBER WITH VISCOSITY MATCHED CORE AND INNER CLAD
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Application No.: US15485619Application Date: 2017-04-12
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Publication No.: US20170219770A1Publication Date: 2017-08-03
- Inventor: Dana Craig Bookbinder , Ming-Jun Li , Hazel Benton Matthews, III , Pushkar Tandon
- Applicant: Corning Incorporated
- Main IPC: G02B6/036
- IPC: G02B6/036 ; C03C3/06 ; C03C13/04 ; G02B6/02 ; C03B37/027

Abstract:
A single mode optical fiber having a core made from silica and less than or equal to about 6.5 weight % germania and having a maximum relative refractive index Δ1MAX. The optical fiber also has an inner cladding surrounding the core and having a minimum relative refractive index Δ2MIN. A difference between a softening point of the core and a softening point of the inner cladding is less than or equal to about 20° C., and Δ1MAX>Δ2MIN. The single mode optical fiber may also have an outer cladding surrounding the inner cladding made from silica or SiON. The outer cladding has a maximum relative refractive index Δ3MAX, and Δ3MAX>Δ2MIN. A method for manufacturing an optical fiber includes providing a preform to a first furnace, the preform, drawing the optical fiber from the preform, and cooling the drawn optical fiber in a second furnace.
Public/Granted literature
- US10228509B2 Low attenuation fiber with viscosity matched core and inner clad Public/Granted day:2019-03-12
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