Keith B Kahen

US Patent:

6545409, Apr 8, 2003

Filed:

May 10, 2001

Appl. No.:

09/853023

Inventors:

Keith B. Kahen - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01J 162

US Classification:

313504, 313506

Abstract:

An organic light-emitting diode includes a transparent substrate, a transparent anode layer disposed over the substrate, and a hole-transport layer disposed over the anode layer. The diode also includes a light-emitting layer disposed over the hole-transport layer, an electron-transport layer disposed over the light-emitting layer, a cathode disposed over the electron-transport layer and having a thickness selected so that light can pass through such cathode, and a light-absorbing layer disposed over the cathode. A dielectric spacer layer disposed over the light-absorbing layer and a conductive layer disposed over the spacer layer and electrically connected to the cathode so that when a voltage is applied between the transparent anode and the cathode, the light-emitting layer produces light which passes directly through the hole-transport layer and the transparent anode and substrate.

US Patent:

6658037, Dec 2, 2003

Filed:

Apr 11, 2001

Appl. No.:

09/832759

Inventors:

Keith B. Kahen - Rochester NY
John A. Lebens - Rush NY
John P. Spoonhower - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01S 30915

US Classification:

372 70, 372 71, 372 72, 372 40, 372 39

Abstract:

A laser emitting apparatus includes an incoherent light-emitting device having a light-emitting layer wherein an electric field is applied across the light-emitting layer to produce light which is transmitted out of the incoherent light-emitting device and a vertical laser cavity structure disposed to receive light transmitted from the incoherent light-emitting device and produce laser light.

US Patent:

6674776, Jan 6, 2004

Filed:

Feb 4, 2002

Appl. No.:

10/066936

Inventors:

Keith B. Kahen - Rochester NY
John A. Lebens - Rush NY
Anna L. Hrycin - Rochester NY
John P. Spoonhower - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01S 314

US Classification:

372 39, 372 96, 372 43

Abstract:

An organic vertical cavity laser light producing device includes a bottom dielectric stack reflective to light over a predetermined range of wavelengths; an organic active region for producing laser light; and a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths. The device also includes the active region in which is contained one or more periodic gain region(s) and organic spacer layers disposed on either side of the periodic gain region(s) and arranged so that the periodic gain region(s) is aligned with the antinodes of the devices standing wave electromagnetic field.

US Patent:

6687274, Feb 3, 2004

Filed:

Feb 4, 2002

Appl. No.:

10/066829

Inventors:

Keith B. Kahen - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01S 314

US Classification:

372 39, 372 43, 372 96

Abstract:

An organic vertical cavity phase-locked laser array device includes a bottom dielectric stack reflective to light over a predetermined range of wavelengths and an organic active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths, and an etched region formed in a surface of the bottom dielectric stack to define an array of spaced laser pixels which have higher reflectance than the interpixel regions so that the array emits coherent phase-locked laser light.

US Patent:

6690697, Feb 10, 2004

Filed:

Aug 20, 2002

Appl. No.:

10/224238

Inventors:

Keith B. Kahen - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01S 314

US Classification:

372 39, 372 70, 372 96

Abstract:

A vertical cavity light-producing device which, in response to incident external light, produces quasi-laser light with an enlarged spectral linewidth selected to improve power conversion efficiency, including a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths; and an organic active region for producing quasi-laser light. The device also includes a top dielectric stack spaced from the bottom stack reflective to light over a predetermined range of wavelengths; the active region includes one or more periodic gain region(s) and organic spacer layers disposed on either side of the periodic gain region(s) arranged so that the periodic gain region(s) is aligned with the antinodes of the devices standing wave electromagnetic field; and the top or bottom dielectric stack being selected so that its peak reflectance is less than 99% and the devices spectral linewidth is increased but produces an acceptable level of spontaneous emission.

US Patent:

6728278, Apr 27, 2004

Filed:

May 23, 2002

Appl. No.:

10/154372

Inventors:

Keith B. Kahen - Rochester NY
Lingadahalli G. Shantharama - Johnstown CO

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01S 314

US Classification:

372 39, 372 96

Abstract:

An organic vertical cavity phase-locked laser array device includes a substrate, a bottom dielectric stack reflective to light over a predetermined range of wavelengths, and an organic active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths, and a patterned reflectance modulator formed on a surface of the substrate to define an array of spaced laser pixels which have higher reflectance than the interpixel regions and causes the array to emit coherent phase-locked laser light.

US Patent:

6790696, Sep 14, 2004

Filed:

Jun 30, 2003

Appl. No.:

10/609922

Inventors:

Keith B. Kahen - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01L 2100

US Classification:

438 34, 438 42

Abstract:

A method of making an organic vertical cavity laser array device includes providing a substrate and a first portion of a bottom dielectric stack reflective to light over a predetermined range of wavelengths and being disposed over the substrate; forming an etched region in the top surface of the first portion of the bottom dielectric stack to define an array of spaced laser pixels which have higher reflectance than the interpixel regions so that the array emits laser light; and forming a second portion of the bottom dielectric stack over the etched first portion. The method also includes forming an active region over the second portion of the bottom dielectric stack for producing laser light, and forming a top dielectric stack over the active region and spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths.

US Patent:

6836495, Dec 28, 2004

Filed:

May 7, 2003

Appl. No.:

10/431056

Inventors:

Keith B. Kahen - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01S 300

US Classification:

372 39

Abstract:

A vertical cavity laser light producing device includes a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths; and an active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths; and the active region includes one or more periodic organic gain region(s) and inorganic spacer layers disposed on either side of the periodic organic gain region(s) and arranged so that the periodic organic gain region(s) is aligned with the antinodes of the devices standing wave electromagnetic field.