David A Welch

Address:

404 Great Fls St, Falls Church, VA 22046

VIN:

5FNYF28697B010172

Make:

HONDA

Model:

PILOT

Year:

2007

US Patent:

6345141, Feb 5, 2002

Filed:

Dec 5, 2000

Appl. No.:

09/730168

Inventors:

Stephen G. Grubb - Columbia MD
David F. Welch - Menlo Park CA

Assignee:

SDL, Inc. - San Jose CA

International Classification:

G02B 602

US Classification:

385127, 372 6

Abstract:

A double-clad optical fiber has an inner cladding that has a torsional stress induced within it during manufacture. By rotating the fiber preform before curing of the inner cladding layer, a physical stress may be permanently imparted to the inner cladding that interacts with pump energy within the inner cladding layer to encourage mode mixing. As the cladding modes are disturbed by the stresses in the fiber, they are redirected so that the light in them intersects the core.

US Patent:

61577634, Dec 5, 2000

Filed:

Mar 30, 1998

Appl. No.:

9/050386

Inventors:

Stephen G. Grubb - Columbia MD
David F. Welch - Menlo Park CA

Assignee:

SDL, Inc. - San JOse CA

International Classification:

G02B 622

US Classification:

385126

Abstract:

A double-clad optical fiber has an inner cladding with a cross-sectional shape that is non-circular, but that maintains a good end-coupling profile. The cross-sectional shape of the inner cladding is such that two perpendicular distances across the shape, each of which passes through a geometric center of a core of the fiber, are equal for all angular positions. Thus, while mode mixing within the inner cladding is enhanced, the inner cladding does not suffer any oblong distortions of its shape, and is therefore more easily coupled to conventional fibers. The cross-sectional cladding shape may include various regions along its outer surface that do not conform to a circular geometry about a center of the core. These regions may include flat regions, or concave or convex regions. The overall cross-sectional shape of the inner cladding may also be octagonal or star-shaped.

US Patent:

20180338911, Nov 29, 2018

Filed:

Oct 26, 2016

Appl. No.:

15/771935

Inventors:

David B. Welch - Winnetka IL, US
Colman R. Kraff - Highland Park IL, US

International Classification:

A61K 9/00
A61K 9/08
A61K 47/32
A61K 47/34
A61P 27/04

Abstract:

A composition and method for applying the composition topically to an eye for improving corneal and surface hydration and reducing blue light neuro-stimulation, especially during the several hours preceding sleep. In one embodiment, the composition combines an artificial tear with fluorescein sodium. The artificial tear may include carboxymehylcellulose sodium, polyvinyl alcohol, hydroxypropyl cellulose and glycerin. In another embodiment, the composition comprises synthetic human melanin combined with fluorescein sodium in an aqueous solution to reduce ocular UV light and HEV light exposure.