Donald B Keck

Address:

2877 Chequers Cir, Big Flats, NY 14814

Phone:

6075623695

VIN:

2T2HK31U77C039390

Make:

LEXUS

Model:

RX 350

Year:

2007

US Patent:

20120000956, Jan 5, 2012

Filed:

Jun 28, 2011

Appl. No.:

13/171435

Inventors:

Michael K. Barnoski - Pacific Palisades CA, US
Suresh T. Gulati - Elmira NY, US
King-Fu Hii - Camarillo CA, US
Donald Keck - Big Flats NY, US
William R. Powell - Horseheads NY, US
R. Ryan Vallance - Newbury Park CA, US

International Classification:

G02B 6/25
B26F 3/00

US Classification:

225 2

Abstract:

Axial tension is applied to an optical fiber that had been scored at the intended cleave location, wherein the axial tension is applied in a time-varying manner to maintain the stress intensity factor for crack on the fiber within an acceptable level to produce a stable crack growth at a reasonable rate to cleave the fiber without requiring polishing of the end surface. Careful control of the applied tension force with time acts to control the velocity of the propagating crack by maintaining substantially constant stress intensity factor. The applied axial tension force is reduced with time and/or crack growth (as crack propagates). As a result, the strain energy in the fiber material is released by formation of a single plane with an optical quality surface without requiring polishing. A substantially flat optical surface of enhanced optical quality is formed at the cleaved end of the optical fiber.

US Patent:

43603718, Nov 23, 1982

Filed:

Mar 30, 1981

Appl. No.:

6/249022

Inventors:

Michael G. Blankenship - Corning NY
Donald B. Keck - Big Flats NY
Arnab Sarkar - Big Flats NY

Assignee:

Corning Glass Works - Corning NY

International Classification:

C03B 1900
C03B 37075

US Classification:

65 312

Abstract:

A single mode optical waveguide is fabricated in a manner such that the core thereof is subjected to a stress-induced birefringence. A hollow intermediate product is formed by depositing layers of cladding and core glass on the inner surface of a substrate tube. Opposite sides of the intermediate product are heated to cause it to collapse into a solid preform foreproduct having an oblong cross-section. A layer of flame hydrolysis-produced soot having a circular outer surface is deposited on the preform foreproduct and is consolidated to form a dense glass cladding layer thereon. The TCE of the outer cladding layer is different from that of the preform foreproduct on which it is deposited so that when the resultant preform is drawn into a fiber, a stress-induced birefringence exists in the core.

US Patent:

59464321, Aug 31, 1999

Filed:

Dec 11, 1997

Appl. No.:

8/981169

Inventors:

Donald B. Keck - Big Flats NY
William J. Miller - Corning NY
Robert A. Modavis - Painted Post NY
Daniel A. Nolan - Corning NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 626
G02B 642

US Classification:

385 27

Abstract:

A Mach-Zehnder filter is provided with a strongly aperiodic transfer function including a broad, sharply defined pass band. The filter can be used in conjunction with optical amplifiers.

US Patent:

56689012, Sep 16, 1997

Filed:

Feb 14, 1996

Appl. No.:

8/601201

Inventors:

Donald B. Keck - Big Flats NY
Robert A. Modavis - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 634

US Classification:

385 37

Abstract:

Fiber Bragg gratings of low reflectivity are given a squared reflectivity function in the form of a tophat configuration having a flat top and lacking undesirable side lobes. Such a reflectivity function for a fiber Bragg grating is achieved by interfering a diffracted beam with a plane wavefront beam so as to impose a sinc function on the resulting interference pattern that imprints the grating on an optical fiber.

US Patent:

44949685, Jan 22, 1985

Filed:

Oct 3, 1983

Appl. No.:

6/538325

Inventors:

Venkata A. Bhagavatula - Corning NY
Donald B. Keck - Big Flats NY

Assignee:

Corning Glass Works - Corning NY

International Classification:

C03B 37075
G02B 5172

US Classification:

65 312

Abstract:

A process for manufacturing a preform from which is drawn an optical fiber, the core of which comprises layers of different glass composition. Layers of glass, adjacent ones of which have different composition, are deposited on a substrate. A process is preferred whereby layers of glass soot are deposited. The soot is consolidated and the resultant laminated glass structure is severed to form an elongated azimuthally asymmetric laminated core structure. A layer of cladding glass is added to the core structure, and the resultant preform is drawn into an optical fiber.

US Patent:

44152302, Nov 15, 1983

Filed:

Mar 30, 1981

Appl. No.:

6/248947

Inventors:

Donald B. Keck - Big Flats NY

Assignee:

Corning Glass Works - Corning NY

International Classification:

G02B 5172

US Classification:

350 9633

Abstract:

A single mode optical waveguide is constructed in a manner such that the core thereof is subjected to a stress-induced birefringence. The fiber comprises an oblong core surrounded by an oblong inner cladding layer. An outer layer of stress cladding glass, which has a circular outer surface, surrounds the inner cladding layer. The TCE of the stress cladding glass is different from that of the inner cladding glass.

US Patent:

53533631, Oct 4, 1994

Filed:

Nov 1, 1993

Appl. No.:

8/143753

Inventors:

Donald B. Keck - Big Flats NY
Mark A. Newhouse - Corning NY
David L. Weidman - Corning NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 624

US Classification:

385 46

Abstract:

A 1. times. N fiber optic switch is disclosed for selectively coupling light from a first fiber to any one of a plurality of output fibers. The switch includes a coupler in which the first optical fiber and the plurality of optical fibers are elongated in a narrowed coupling region. The coupling region can be bent in various directions to cause the radius of curvature of the input fiber to differ from that of at least one of the output fibers, whereby light propagating in the input fiber can be coupled to only one of the output fibers or to more than one of those fibers.

US Patent:

55794289, Nov 26, 1996

Filed:

Jun 7, 1995

Appl. No.:

8/482716

Inventors:

Alan F. Evans - Beaver Dams NY
Donald B. Keck - Big Flats NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 618

US Classification:

385124

Abstract:

A combination of dispersion flattened single mode optical waveguide fiber and soliton signal pulses yields an optimum telecommunication system capacity. The dispersion flattened fiber serves to relax tolerances on soliton center wavelength and intensity. In addition, the inventive combination facilitates the design and use of long haul systems using optical amplifiers.