Northrop Grumman Systems Corporation

Mcdonnell Douglas Corporation

The Boeing Company

Leidos, Inc.

Foro Energy, Inc.

Northrop Grumman Space & Mission Systems Corporation

Other

Clemson University

Robert R Rice

Mark S Zediker

Michael G Wickham

Joshua E Rothenberg

Hiroshi Komine

Elizabeth Twyford Kunkee

Sami Ali Shakir

Neil F Ruggieri

Jan Vetrovec

Gordon H Burkhart

Jack Herbert Hollister

Brian O Faircloth

Peter Moshchansky Livingston

William F Krupke

John M Haake

John Ballato

Hagop Injeyan

Robert A Morgan

Samuel I Green

Chester Lee Balestra

Richard A Skogman

Noah Peter Christian

Herbert G Koenig

Louis B Allen, Jr

Brian Gorin

James F Shanley

Eric C T Cheung

J Stanley Whiteley

J Frank Camacho

Augie Ifarraguerri

David Roderick Gerwe

Peter Anthony Thielen

Barry Dunbridge

Mark Ernest Weber

Michael Manuel Fitelson

Burke E Nelson

Bartley C Johnson

Jeffrey R Heidel

Harold Barry Schall

Victor H Nettle

Robert A Stacy

Alan J Bacon

Peter Y M Livingston

Danny J Krebs

Martin Richard Flannery

Joe B Russek

Richard J Tansey

James R Teague

Jean A Schuette

Chester Lee Balastra

Derek Evan Schulte

William Bryan Cottingame

Charles Phillip Asman

William Byron Cottingame

Mark Alan Folkman

Allen Priest

Chester L Balestra

Eric H Bott

Eric Chiu-Tat Cheng

Wil S Otaguro

Hacop Injeyan

Mark Anthony McCamish

Louis B Allen

A system and process scans a target area at a distance of 3-30 m for one or more materials. Scanning is performed by a coherent transmit beam aimed with the help of a thermal camera. The active source of the beam is a supercontinuum (SC) laser. The transmitted source beam is modulated by a high-speed Fourier-transform spectrometer prior to interaction with the target. Target reflected source beam is detected by an infrared detector, along with a reference portion of the transmitted source beam, as a series of interferograms; passed through a digitizer for digitizing the interferograms; and processed to producing spectrograms, wherein the spectrograms are indicative of one or more materials on the target.

Standoff trace chemical detection with active infrared spectroscopy

There are provided using deuterium oxide as a media for transmitting high power lasers to perform laser operations, such as cutting, boring and drilling, a target material. High power laser beams are transmitted through a deuterium oxide beam path to a target material, including material in a pressure containment vessel.

High power laser iris cutters

One embodiment is a wide stripe semiconductor waveguide, which is cleaved at a Talbot length thereof, the wide stripe semiconductor waveguide having facets with mirror coatings. A system provides for selective pumping the wide stripe semiconductor waveguide to create and support a Talbot mode. In embodiments according to the present method and apparatus the gain is patterned so that a single unique pattern actually has the highest gain and hence it is the distribution that oscillates.

Method for mode control in multimode semiconductor waveguide lasers

High power laser fluid jets and beam paths using deuterium oxide

Disclosed is an optical fiber formed from a preform that includes a clad material and a core material. The clad material includes an oxide glass and the core material includes as a primary component a semiconductor material that melts at a temperature below where the cladding glass draws into fiber. In addition, the core material includes a scavenger for oxide precipitates that can precipitate into the core from the adjacent clad material during the fiber formation process. During formation, the scavenger reduces oxide precipitate to form the core primary component, or a phase compatible with it, and volatile products. The volatile products evolve out of the system. The primary material of the core can melt during the fiber formation process and crystallize upon cooling leaving the formed optical fiber with a crystalline core and little or no impurities due to precipitation of oxide into the core.

High purity crystalline core optical fibers and formation methods thereof

One embodiment of the invention includes a method for forming an optical fiber. The method comprises providing a preform having a core material and a glass cladding material surrounding the core material. The method also comprises drawing the preform at a temperature that is greater than a melting temperature of the core material to form a drawn fiber. The method further comprises cooling the drawn fiber to form the optical fiber having a crystalline fiber core and a cladding that surrounds the crystalline fiber core and extends axially along a length of the crystalline fiber core.

Optical fiber systems and methods

One embodiment of the present method and apparatus encompasses an apparatus that may have: a predetermined length, the self-imaging semiconductor waveguide having first and second opposed sides; quantum wells disposed within the self-imaging semiconductor waveguide along the length of the self-imaging semiconductor waveguide, the quantum wells being formed of a quantum well gain material; microchannel cooler that extends substantially the width of the self-imaging semiconductor waveguide, the microchannel cooler located adjacent the first side of the self-imaging semiconductor waveguide; and a plurality of pump arrays arranged along the microchannel cooler opposed from the first side of the self-imaging semiconductor waveguide; wherein the quantum well gain material is photopumped through the microchannel cooler.

Scalable semiconductor waveguide amplifier

An edge photo-pumped semiconductor slab amplifier including an undoped semiconductor slab. A first gain structure is formed on an upper surface of the slab and a second gain structure is formed on a lower surface of the slab. The gain structures can be resonant periodic gain structures including a plurality of stacked quantum well layers. Confining layers are coupled to the gain structures to confine a signal beam within the semiconductor slab. Heat sinks are thermally coupled to the confining layers. Optical pump sources are provided along the side edges or coupled to the end edges of the slab so that pump light is introduced into the slab through the edges to provide gain for the quantum well layers.

Photo-pumped semiconductor optical amplifier

An antenna system including at least one fiber antenna element having a semiconductor core and an outer cladding layer, where the core has a higher index of refraction than the cladding layer. A pump source provides pump light to the cladding layer in a manner that allows the pump light to propagate down the cladding layer to be absorbed by the core to generate photo-carriers in the core. An antenna circuit is electrically coupled to the core and provides one or both of an RF signal to the core for transmission purposes or receiving an RF signal from the core for reception purposes.

Photoconductive semiconductor fiber antenna

A method is provided for forming an optical fiber amplifier. The method comprises providing a composite preform having a gain material core that includes one or more acoustic velocity varying dopants to provide a longitudinally varying acoustic velocity profile along the gain material core to suppress Stimulated Brillouin Scattering (SBS) effects by raising the SBS threshold and drawing the composite preform to form the optical fiber amplifier.

Optical fiber amplifier and methods of making the same

A waveguide parametric device including a multi-mode waveguide having orientation layers formed in a propagation direction of a signal beam and a pump beam propagating down the waveguide. The orientation layers are oppositely oriented to provide non-linear coupling between the pump beam and the signal beam and have a periodicity that provides quasi-phase matching for a fundamental propagation mode, where the waveguide has a size to accommodate multi-mode wave propagation.

Waveguide parametric device and method

Systems and methods are provided for detecting contaminants associated with a target. In one embodiment, a system is provided that comprises a tunable laser configured to transmit an illuminator pulse at a target for a predetermined time duration and a laser Doppler vibrometer system configured to transmit a probe pulse at a surface of the target within the predetermined time duration. The laser Doppler vibrometer system is further configured to detect and analyze at least one return pulse of the probe pulse to determine a surface expansion velocity of contaminants associated with the target due to the illuminator pulse.

Systems and methods for detecting contaminants

Growing community of inventors

Chesterfield, MO, United States of America

Robert R Rice