Corning Incorporated

Anatoly Glass, LLC

Dominick Fiordimalva

Paul Andrew Chludzinski

Snigdharaj Kumar Mishra

Steven Bruce Dawes

Douglas Hull Jennings

Timothy Leonard Hunt

Sonya Marie Raney

Peter Gottfried Hebgen

Anatoly Kishinevski

Justin Herzig

The present disclosure provides optical fiber preforms formed from core canes having large core-clad ratio, intermediate core-cladding assemblies, and methods for making the preforms and core cladding assemblies. The preforms are made with capped core canes. The capping material has a coefficient of thermal expansion less than the coefficient of thermal expansion of the core cane and more closely matched to or lower than the coefficient of thermal expansion of the surrounding cladding monolith in a cane-in-soot process. Presence of the cap reduces stresses that arise from differential thermal expansion of the core cane and cladding materials and leads to preforms having low defect concentration and low probability of failure during subsequent thermal processing steps.

Method to prevent cracks in optical fiber preforms

A glass cane is manufactured by filling a glass tube with a combination of glass structures forming a cross-sectional pattern within the glass tube, to form a preform. The preform is attached to a draw assembly, such as a draw tower. The draw assembly is operated to draw the preform to a reduced-diameter glass cane by passing the preform through a furnace of the draw assembly while pulling the preform or the reduced-diameter glass cane and rotating the preform or the reduced-diameter glass cane.

Twisted glass canes for artists

Manufacturing an optical fiber by using an outside vapor deposition technique for making a substrate, applying one or more layers to the substrate using a radial pressing technique to form a soot blank, sintering the soot blank in the presence of a gaseous refractive index-modifying dopant, and drawing the sintered soot blank, provides a more efficient and cost effective process for generating complex refractive index profiles.

Pressed, multilayered silica soot preforms for the manufacture of single sinter step, complex refractive index profile optical fiber

An optical fiber includes a central glass core region comprising maximum refractive index delta percent &#x394;, a first inner annular region surrounding said core comprising refractive index delta percent &#x394;, a depressed annular region surrounding said inner annular region and comprising &#x394;and a third annular region surrounding the depressed annular region comprising refractive index delta percent &#x394;; wherein the third annular region comprises chlorine an amount greater than 0.2 weight percent in a region which is within 5 microns from the depressed annular region, wherein &#x394;&#x3e;&#x394;&#x3e;&#x394;&#x3e;&#x394;. The difference between &#x394;and &#x394;is greater than 0.01 and profile volume, |V| is at least 50% &#x394;&#x3bc;m.

Low bend loss optical fiber

Growing community of inventors

Wilmington, NC, United States of America

Dominick Fiordimalva