Jerry W Hedrick

US Patent:

7888248, Feb 15, 2011

Filed:

Jul 13, 2007

Appl. No.:

11/826278

Inventors:

Narsingh Bahadur Singh - Ellicott City MD, US
Brian P. Wagner - Baltimore MD, US
David J. Knuteson - Columbia MD, US
David Kahler - Arbutus MD, US
Andre E. Berghmans - Owing Mills MD, US
Michael Aumer - Raleigh NC, US
Jerry W. Hedrick - Arnold MD, US
Marc E. Sherwin - Catonsville MD, US
Michael M. Fitelson - Columbia MD, US
Mark S. Usefara - Baltimore MD, US
Sean McLaughlin - Severn MD, US
Travis Randall - Baltimore MD, US
Thomas J. Knight - Silver Spring MD, US

Assignee:

Northrop Grumman Systems Corporation - Los Angeles CA

International Classification:

H01L 21/20

US Classification:

438492

Abstract:

A method for growing a SiC-containing film on a Si substrate is disclosed. The SiC-containing film can be formed on a Si substrate by, for example, plasma sputtering, chemical vapor deposition, or atomic layer deposition. The thus-grown SiC-containing film provides an alternative to expensive SiC wafers for growing semiconductor crystals.

US Patent:

7983313, Jul 19, 2011

Filed:

Jan 30, 2009

Appl. No.:

12/320622

Inventors:

Sami A. Shakir - Albuquerque NM, US
Burke E. Nelson - Albuquerque NM, US
William R. Culver - Albuquerque NM, US
Michael M. Fitelson - Columbia MD, US
Jerry W. Hedrick - Arnold MD, US
George M. Bates - Burke VA, US

Assignee:

Northrop Grumman Information Technology, Inc. - Los Angeles CA

International Classification:

H01S 3/30
H01S 3/10
H01S 3/08
G02B 6/26
G02B 6/32

US Classification:

372 6, 372 20, 372 23, 372108, 385 25, 385 26, 385 33, 385 35

Abstract:

A system and a method for coupling multiple pump light beams to an active fiber. The system including an inverted conical disk, concave lens or glass wedge, an active fiber placed in a center of the inverted conical disk (or concave lens) or at a bottom facet of the glass wedge and a plurality of pump light sources. The system further includes a plurality of lenses for focusing pump light beams from pump light sources towards a side of the inverted conical disk, concave lens or glass wedge, wherein the inverted conical disk, concave lens or glass wedge, couples the pump light beams into the active fiber. A method for coupling multiple pump light beams to an active fiber. The method includes providing an inverted conical disk, concave lens or glass wedge. The method further includes providing an active fiber in approximately the center of the inverted conical disk (or concave lens) or at a bottom facet of the glass wedge. The method further includes pump light sources for emitting pump light beams and focusing lenses for focusing pump light beams toward the axis of the active fiber.

US Patent:

8351114, Jan 8, 2013

Filed:

Feb 2, 2009

Appl. No.:

12/320681

Inventors:

Burke E. Nelson - Albuquerque NM, US
Sami A. Shakir - Albuquerque NM, US
William R. Culver - Albuquerque NM, US
Yuji S. Starcher - Albuquerque NM, US
Jerry W. Hedrick - Arnold MD, US
George M. Bates - Burke VA, US

Assignee:

Northrop Grumman Systems Corporation - Falls Church VA

International Classification:

H04B 10/17
G02B 6/26
G02B 6/32

US Classification:

359349, 3593415, 385 43, 385115

Abstract:

A system for combining multiple fiber amplifiers, or multiple fiber amplifiers. The system includes a fiber combiner with multiple cores for connecting with the multiple fiber amplifiers and for combining the beams of the fiber amplifiers into a single beam. The fiber amplifiers are aligned, tapered, and stretched. A method for combining fiber amplifiers includes emitting a beam from a tapered fiber combiner and transmitting and coupling a portion of the emitted beam back into the fiber combiner via a feedback fiber. The transmission and coupling of the feedback fiber includes mixing the feedback fiber with the output of an auxiliary laser and boosting the feedback fiber by a pre-amplifier. The feedback fiber is split into a plurality of beams by a fiber splitter. The beams are fed into an array of fiber amplifiers and combined with output of the individual fiber amplifiers to form the tapered fiber combiner.

US Patent:

20060170608, Aug 3, 2006

Filed:

Jan 28, 2005

Appl. No.:

11/046314

Inventors:

Jerry Hedrick - Manlius NY, US

International Classification:

H01Q 21/00

US Classification:

343853000, 3437000MS, 343876000

Abstract:

A reconfigurable array including: a plurality of imaging layer including an array of software addressable pixels; a conductive/non-conductive layer being positioned with respect to corresponding ones of the pixels such that addressing them causes corresponding portions of the conductive/non-conductive layer to be conductive; a radiator layer being positioned with respect to corresponding ones of the pixels such that addressing them defines at least one radiator array; a switching and summing layer positioned with respect to corresponding ones of the pixels such that the addressing them causes corresponding portions of switching and summing layer to switch and sum the signals; and, a plurality of inputs coupled to the imaging layers and being under software control to selectively activate the pixels.