Francisco J Duarte

US Patent:

6888862, May 3, 2005

Filed:

Jun 9, 2003

Appl. No.:

10/457634

Inventors:

Francisco J. Duarte - Rochester NY, US
Robert O. James - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01S003/14

US Classification:

372 39

Abstract:

A gain medium for producing a light emission in a laser. The gain medium comprises a dye-doped polymer nanoparticle matrix having an absolute value of dn/dT less than an absolute value of dn/dT of its dye-doped polymer matrix.

US Patent:

6903824, Jun 7, 2005

Filed:

Dec 20, 2002

Appl. No.:

10/327392

Inventors:

Francisco J. Duarte - Rochester NY, US
Brian A. Reed - Rochester NY, US
Chris J. Burak - Edgewood NM, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G01N021/00

US Classification:

356443, 356432

Abstract:

An optical apparatus. More particularly, a laser sensitometer. The apparatus comprises: a polarized light source adapted to provide a Gaussian beam of light directed along an optical axis; a rotatable polarizer disposed in the optical axis adapted to vary an intensity of the beam of light, the polarizer being rotatable about the optical axis; and a rotatable polygon disposed in the optical axis, the polygon being rotatable about an axis perpendicular to the optical axis.

US Patent:

7065115, Jun 20, 2006

Filed:

Jan 29, 2004

Appl. No.:

10/767713

Inventors:

Brian E. Kruschwitz - Rochester NY, US
Francisco J. Duarte - Rochester NY, US
Andrew F. Kurtz - Rochester NY, US
John P. Spoonhower - Webster NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01S 3/14
H01S 3/20
H01S 3/08

US Classification:

372 39, 372 53, 372 92, 372 99

Abstract:

A thin-film organic laser, that includes: a substrate; a bottom mirror provided on the substrate; at least one active region deposited on the bottom mirror, wherein the at least one active region includes organic gain material; an external mirror provided at a predetermined distance from the at least one active region such that the bottom mirror combined with the external mirror forms a laser resonator; and an optical pumping means for exciting the organic gain material to produce a laser beam with a wavelength λ and at least one lateral laser mode in the laser resonator and an output of laser light.

US Patent:

7667391, Feb 23, 2010

Filed:

Aug 4, 2006

Appl. No.:

11/499474

Inventors:

Francisco J. Duarte - Rochester NY, US
Kathleen M. Vaeth - Rochester NY, US
Liang-Sheng Liao - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01J 1/62

US Classification:

313506, 313112, 313503

Abstract:

A light-emitting device, comprising: a multi-layer stack of materials supported on an optically transparent support member, a first spatial filter, and a second spatial filter spaced from the first spatial filter. The multi-layer stack including at least one organic light-emitting layers, an anode layer, and a cathode layer. The first spatial filter is disposed intermediate the multi-layer stack of materials and the second spatial filter.

US Patent:

20040076204, Apr 22, 2004

Filed:

Oct 16, 2002

Appl. No.:

10/272611

Inventors:

Brian Kruschwitz - Rochester NY, US
Francisco Duarte - Rochester NY, US
Andrew Kurtz - Rochester NY, US
John Spoonhower - Webster NY, US

International Classification:

H01S003/14

US Classification:

372/039000

Abstract:

A thin-film organic laser, that includes: a substrate; a bottom mirror provided on the substrate; at least one active region deposited on the bottom mirror, wherein the at least one active region includes organic gain material; an external mirror provided at a predetermined distance from the at least one active region such that the bottom mirror combined with the external mirror forms a laser resonator; and an optical pumping means for exciting the organic gain material to produce a laser beam with a wavelength and at least one lateral laser mode in the laser resonator and an output of laser light.

US Patent:

20040120373, Jun 24, 2004

Filed:

Dec 20, 2002

Appl. No.:

10/325549

Inventors:

Francisco Duarte - Rochester NY, US
Robert James - Rochester NY, US
Lawrence Rowley - Rochester NY, US

Assignee:

Eastman Kodak Company

International Classification:

H01S003/14
H01S003/20

US Classification:

372/039000

Abstract:

A gain medium for producing a light emission in a laser. The gain medium comprises a dye-doped polymer nanoparticle matrix. In a preferred embodiment, the gain medium comprises a Rhodamine-doped PMMA-silica matrix.

US Patent:

20040208536, Oct 21, 2004

Filed:

May 21, 2002

Appl. No.:

10/152474

Inventors:

Francisco Duarte - Rochester NY, US

International Classification:

H04B010/00

US Classification:

398/039000

Abstract:

N-slit interferometry is applied to generate at least one optical signal representative of an alphabetical or numerical character, symbol, or the like. In particular, the present invention relates to an optical communication system for generating an interferometric character, comprising: a light source emitting a beam of coherent light directed along an optical path; a detector disposed in the optical path; a transmission grating disposed in the optical path intermediate the light source and the digital detector, and a multiple-prism beam expander disposed in the optical path intermediate the light source and the transmission grating adapted to illuminate the transmission grating to generate an interferometric pattern on the detector, the interferometric pattern being representative of the character.

US Patent:

20050083986, Apr 21, 2005

Filed:

Oct 17, 2003

Appl. No.:

10/687998

Inventors:

Francisco Duarte - Rochester NY, US

International Classification:

H01S003/091

US Classification:

372070000

Abstract:

A light-emitting diode pumped laser and method of excitation. The laser apparatus emits a beam of coherent light directed along an optical axis, and includes a first and second optical element; at least one light-emitting diode; a gain medium; and a guiding member. The light-emitting diode produces a beam of light directed along an optical excitation path transverse to the optical axis of the laser apparatus. The gain medium is disposed in the optical axis and the optical excitation path, intermediate the first and second optical elements, for producing the beam of coherent light along the optical axis. The guiding member directs the beam of light produced by the light-emitting diode toward the gain medium.