John Wayne Gilliland

US Patent:

6360565, Mar 26, 2002

Filed:

Nov 20, 1998

Appl. No.:

09/194173

Inventors:

William R. Christoff - Elmira NY
Paul D. Doud - Lawrenceville PA
John W. Gilliland - Horseheads NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

C03B 37075

US Classification:

65403, 65412

Abstract:

A glass preform ( ) is drawn into a fiber. Holes ( ), running the length of the preform ( ), collapse during the drawing, this causes the core ( ) to have an elliptical cross section.

US Patent:

6587624, Jul 1, 2003

Filed:

Dec 11, 2001

Appl. No.:

10/014313

Inventors:

William R. Christoff - Elmira NY
Paul D. Doud - Lawrenceville PA
John W. Gilliland - Horseheads NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 602

US Classification:

385123, 385 11, 385141

Abstract:

A glass preform is drawn into a fiber. Holes, running the length of the preform, collapse during the drawing, causing the core to have an elliptical cross section.

US Patent:

56813651, Oct 28, 1997

Filed:

Mar 28, 1995

Appl. No.:

8/412489

Inventors:

John W. Gilliland - Horseheads NY
Alan J. Morrow - Elmira NY
Kenneth Sandhage - Columbur OH

Assignee:

Corning Incorporated - Corning NY

International Classification:

C03B 37027

US Classification:

65377

Abstract:

A radiation resistant optical waveguide fiber doped with fluorine or drawn with low tension in the fiber. The fluorine doping is substantially constant across the core and a portion of the clad adjacent the core. The concentration of the fluorine is in the range of about 0. 3 to 3. 0 weight percent. The draw tension is less than or equal to about 5 grams (40 dynes/cm. sup. 2) to achieve optimum radiation resistance. A synergy is found when fluorine and low draw tension are applied to a fiber. Improvement in radiation resistance is largely independent of fiber type and geometry. Further improvement in radiation resistance is found when germanium is doped in a portion of the clad adjacent the core.

US Patent:

48102768, Mar 7, 1989

Filed:

Aug 5, 1987

Appl. No.:

7/081755

Inventors:

John W. Gilliland - Horseheads NY

Assignee:

Corning Glass Works - Corning NY

International Classification:

C03B 37018
C03C 2500

US Classification:

65 312

Abstract:

A method is disclosed for making a step-index optical fiber having a steep refractive index gradient between core and cladding. Core glass particles comprising a base glass and a refractive index-increasing dopant are deposited on a mandrel. The mandrel is removed and the resultant soot preform is consolidated to form a core preform having a dopant-poor surface region. The core glass preform is stretched and the hole therein is closed to form a core bait rod. Cladding glass soot is deposited on the core bait rod at a density which is at least 0. 5 g/cc. This is accomplished by directing the flame from an auxiliary burner onto the core bait rod immediately prior to the deposition of cladding soot thereon. The resultant preform is consolidated and drawn into an optical fiber. In another embodiment, the etched core preform is overclad with a layer of cladding glass, and the composite preform is stretched prior to applying a second overclad layer.

US Patent:

55091016, Apr 16, 1996

Filed:

Jul 11, 1994

Appl. No.:

8/272803

Inventors:

John W. Gilliland - Horseheads NY
Alan J. Morrow - Elmira NY
Kenneth Sandhage - Columbur OH

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 600
C03B 37023

US Classification:

385142

Abstract:

A radiation resistant optical waveguide fiber doped with fluorine or drawn with low tension in the fiber. The fluorine doping is substantially constant across the core and a portion of the clad adjacent the core. The concentration of the fluorine is in the range of about 0. 3 to 3. 0 weight percent. The draw tension is less than or equal to about 5 grams (40 dynes/cm. sup. 2) to achieve optimum radiation resistance. A synergy is found when fluorine and low draw tension are applied to a fiber. Improvement in radiation resistance is largely independent of fiber type and geometry. Further improvement in radiation resistance is found when germanium is doped in a portion of the clad adjacent the core.