Dallas N Barr

US Patent:

6373865, Apr 16, 2002

Filed:

Feb 1, 2000

Appl. No.:

09/496281

Inventors:

John E. Nettleton - Fairfax Station VA 22039
Bradley W. Schilling - Fredericksburg VA 22406
Dallas N. Barr - Woodbridge VA 22192

International Classification:

H01S 311

US Classification:

372 10, 372 22, 372 27, 372106

Abstract:

A subassembly for a high powered light pumped, Q-switched and linearly polarized laser with an optical parametric oscillator, the subassembly consisting of two or three rod shaped elements having precisely ground endfaces with selected coatings mounted on a special pallet that at least partially aligns the optical axes of the elements.

US Patent:

6556614, Apr 29, 2003

Filed:

Mar 28, 2002

Appl. No.:

10/107241

Inventors:

John E. Nettleton - Fairfax Station VA 22039
Bradley W. Schilling - Fredericksburg VA 22406
Dallas N. Barr - Woodbridge VA 22192

International Classification:

H01S 310

US Classification:

372107, 372 54, 372109, 372108, 372 21, 372 50

Abstract:

A laser cavity assembly for high power optical range-finders consisting of two rods of lasing material co-axially mounted on a thin substrate of the same or thermally equivalent material, selected end-faces of the rods being bonded to layers or wafers of optical materials chosen from a group consisting of materials used in Q-switches, filters, matching transformers, linear polarizers and reflecting mirrors.

US Patent:

6744801, Jun 1, 2004

Filed:

Mar 28, 2002

Appl. No.:

10/107183

Inventors:

John E. Nettleton - Fairfax Station VA
Bradley W. Schilling - Fredericksburg VA
Dallas N. Barr - Woodbridge VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01S 311

US Classification:

372 50, 372 10, 372 27, 372 73, 372 97, 372106, 372108

Abstract:

A one piece laser assembly including a rod of gain medium with one end-face bonded to a broad end-face on a stack of optical wafers that process light differently and mirrors plated on the remaining exposed end-faces of the rod and the stack of wafers.

US Patent:

7039087, May 2, 2006

Filed:

May 13, 2004

Appl. No.:

10/844446

Inventors:

John E. Nettleton - Fairfax Station VA, US
Dallas N. Barr - Woodbridge VA, US
Charlie W. Trussell - Woodbridge VA, US

Assignee:

The United States of America as represented by the Department of the Army - Washington DC

International Classification:

H01S 3/091
H01S 3/092
H01S 3/081

US Classification:

372 71, 372 10, 372 93

Abstract:

The End Pumped Slab Laser Cavity incorporates all optical components required for a short-pulse laser. These optical components are ‘locked’ into alignment forming an optical laser cavity for diode laser or flash lamp pumping. The optical laser cavity never needs optical alignment after it is fabricated. The cavity is configured for optimal absorbtion for diode laser end-pumping over broad temperature ranges.

US Patent:

7068699, Jun 27, 2006

Filed:

Apr 29, 2004

Appl. No.:

10/839451

Inventors:

John E. Nettleton - Fairfax Station VA, US
Dallas N. Barr - Woodbridge VA, US
Jonathan S. Lei - Springfield VA, US

Assignee:

The United States of America as represented by the Department of the Army - Washington DC

International Classification:

H01S 3/08
G02B 27/14
G02B 27/12

US Classification:

372 92, 372108, 359629, 359634, 359639

Abstract:

A multi-function combat laser is described that uses single or multiple laser sources (laser diodes) in a configuration such that when it is coupled with a dichroic substrate the laser sources outputs are coupled to produce a single desired output. The multi-function combat laser consolidates multiple laser functions for the dismounted soldier into a single package with shared power supplies, optics and laser sources.

US Patent:

7133123, Nov 7, 2006

Filed:

Apr 27, 2004

Appl. No.:

10/833634

Inventors:

Jonathan S. Lei - Springfield VA, US
Bradley W. Schilling - Fredericksburg VA, US
Dallas N. Barr - Woodbridge VA, US
John E. Nettleton - Fairfax Station VA, US
Michael M. Quarles - Stafford VA, US

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

G01C 3/08

US Classification:

356 401

Abstract:

The laser obstacle avoidance device of the present invention includes an optical head which includes a laser source which produces a laser signal, crossed cylindrical lenses and through which the laser signal is transmitted, a transceiver including a receiving lens through which a reflected laser signal is received by the transceiver, a receiver and a line filter through which the reflected laser signal is filtered, and scanners which receive the reflected laser signal; and control electronics optically connected to the optical head, wherein the control electronics comprise scanner driver electronics, range processor electronics, power converters, and a display all which produce an x-y display of the terrain scanned by the laser signal wherein the X-axis is driven by a scanner position output and the Y-axis by range data. The system was designed to avoid hazards with emphasis simplicity and low cost. The device has been employed in the field to collect data from natural and man-made objects.

US Patent:

7428252, Sep 23, 2008

Filed:

Mar 14, 2007

Appl. No.:

11/686348

Inventors:

John E. Nettleton - Fairfax Station VA, US
Dallas N. Barr - Woodbridge VA, US

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01S 3/11

US Classification:

372 10, 372 21, 372101

Abstract:

A monoblock laser cavity includes a plurality of discrete optical components disposed serially on a substrate and sharing a common optical axis. The optical components include a laser rod of gain material, a Q-switch, an OPO crystal, an output coupler, and a positive lens. The output coupler has a convex input end face and a concave output end face, and acts as the expanding lens element of a beam expander, and the positive lens completes the beam expander to improve the beam quality.

US Patent:

7532650, May 12, 2009

Filed:

Mar 14, 2007

Appl. No.:

11/686336

Inventors:

John E. Nettleton - Fairfax Station VA, US
Dallas N. Barr - Woodbridge VA, US

Assignee:

The United States of America as represented by the Department of the Army - Washington DC

International Classification:

H01S 3/098

US Classification:

372 18, 372101, 372108

Abstract:

A monoblock laser cavity includes a plurality of discrete optical components disposed serially on a substrate and sharing a common optical axis. The optical components include a laser rod of gain material, a Q-switch, an OPO crystal, and an output coupler. The output coupler has at least one convex end face to improve the beam quality.