Abstract:Today"s high energy Q-switched Nd:YAG lasers are often pumped by stacks of multiple edge-emitting diode laser bars since the vertical-cavity surface-emitting laser (VCSEL) traditionally have been lower in efficiency. In this effort we are proposing a novel VCSEL design which overcomes the… more
Abstract:nLIGHT proposes a two dimensional Wavelength Stabilized Vertical External Cavity Surface Emitting Lasers (WS-VECSEL) as a pump source for Rb vapor alkali laser used in directed energy weapons. The integration of a narrow-band reflector (i.e. a volume holographic grating) into the external cavity… more
Abstract:nLight proposes the development of high efficiency, high average power 1550-nm laser transmitter system that is based on Er-doped fiber amplifier resonantly pumped by high efficiency 1532-nm fiber-coupled diode laser pumps. To meet the efficiency requirement for space communication, nLight proposes… more
Abstract:nLIGHT proposes the development of a multiple spectral band laser head that is based on a vertically stacked array of single emitter laser diodes. A key design aspect of this device is that the proposed laser head is largely based on a multi-emitter pump module that is currently under commercial… more
Abstract:ABSTRACT: The efficient coherent beam combination of a master oscillator power amplifier (MOPA) system requires a reduction in non-linearities of the power amplifier sections. Fiber non-linearities, such as stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS), provide an… more
Abstract:ABSTRACT: nLIGHT proposes the development of of an all-fiber, master oscillator power amplifier (MOPA) configuration that will meet the Air Force requirements for a 10 mJ, 300 ns pulsed laser source. With the exception of the output power amplifier fiber, this device will be based on commercial… more
Abstract:Based on the promising results obtained under Navy Phase I SBIR funding, nLight proposes a Phase II continuation toward the development of fiber-coupled high power and high efficiency diode laser pumps around 975 nm that operate at high ambient temperatures. Under the Phase I SBIR base program,… more
Abstract:ABSTRACT: The objective of this proposal is to achieve an operational capability to produce daily forecasts of the extended extreme ultraviolet solar spectral irradiance (XUV/EUV/FUV SSI, hereafter EUV SSI) by delivering quantitative expectations of the EUV SSI at high-spectral resolution for every… more
Abstract:UHF radars at high latitude observe significant perturbations in measurements of amplitude, phase, range, and Doppler, caused by ionospheric disturbances. Without mitigation of these effects, there is no doubt that the natural ionosphere is a major issue in the performance of the important radar… more
Abstract:Many activities and technological systems prevalent in today’s society – air traffic control and air travel, the power grids, communications, deep-water drilling operations, human spaceflight – are vulnerable to the effects of sudden flares from our Sun. Because the propagation speed for… more
Abstract:ABSTRACT: Coordinate Registration (CR) of OTHR targets requires accurate real-time ionospheric modeling coupled with HF propagation calculations to convert radar-measured target signal delays and beam steers to geographical position. Our team is the developer of one of the most sophisticated… more
Abstract:OMAX proposes to develop an abrasive-waterjet (AWJ) system for drilling angled shaped holes in TBC-coated metals and engine components. Waterjet technology has technological and manufacturing merits that are unmatchable by many existing machine tools. In particular, OMAX will take advantage of… more
Abstract:Refractory alloys such as tantalum-tungsten and ceramics are being pursued as a solution to high temperature erosive wear of gun barrels. However rifling of these materials with conventional broaching and electrochemical milling is proving to be difficult. This proposal seeks to demonstrate an… more
Abstract:DESCRIPTION (provided by applicant): New therapies are desperately needed to relieve patients with Type 1 diabetes from the neuropathy, nephropathy and retinopathy associated with the current standard of treatment, injected insulin. Transplantation of pancreatic islet -cells, in combination with… more
Abstract:DESCRIPTION (provided by applicant): Alzheimer's disease (AD) is characterized by brain amyloid plaques consisting of insoluble beta-amyloid protein (A?), and neurofibrillary tangles (NFTs) containing aggregated tau protein. AD drug discovery efforts havebeen largely focused on reducing brain… more
Abstract:We propose to develop an active sensor for in situ measurement of the inherent optical properties (IOPs) absorption and backscattering at multiple wavelengths. Multi- or hyper-spectral absorption of particles and dissolved materials is routinely measured in the laboratory and in situ in order to… more
Abstract:NASA missions for planetary exploration require high power, long-life Hall thrusters. However, thruster power and lifetime are limited by the erosion of plasma channel walls. Current plasma channel insulator materials, such as BN or Borosil, have the required low secondary electron emission (SEE)… more
Abstract:Conventional dielectric materials for radomes and windows for supersonic/hypersonic tactical missiles exhibit a number of performance limitations including inadequate thermal shock resistance, variations in electrical (dielectric constant and loss) and structural performance (mechanical strength)… more
Abstract:Carbon-fiber reinforced silicon carbide matrix (SiC/Cf) composite was identified as the leading thruster construction material for SDACS for SM3-Block IIB. For SDACS propulsion applications, SiC/Cf composite surfaces must be hermetically sealed and SiC/Cf composite must be joined to each other and… more
Abstract:Heritage vehicles with large, axial thrust rocket motors have used extendable nozzles with great success. The Ballistic Missile Defense System (BMDS) future interceptors, including the SM-3 Block IIB, require advanced DACS to evolve the BMDS toward emerging threats. Building upon its core… more
Abstract:Systima Technologies, Inc. (Systima) is developing an end-to-end integrated All-Up-Round (AUR) canister to provide a multiple missile launcher (MML) for Extended Area Protection & Survivability (EAPS) missiles. By allowing a single MML-AUR to provide up to 8 EAPS missiles the number of… more
Abstract:Systima in collaboration with the University of Washington will develop a high performance, advanced green monopropellant microthruster (0.1?1.0 N) for small- and micro-satellites. The microthruster utilizes a high energy density HAN-based monopropellant AF-M315E, and a novel injection system to… more
Abstract:Systima will develop an innovative light weight self-pressurizing pump (SPP) technology to provide a constant-pressure supply of monopropellant to a spacecraft or tactical propulsion system. The SPP does not require a helium tank and higher operating pressure have a negligible impact on the system… more
Abstract:The research proposed under this effort is focused on addressing the need for improved real-time in-situ sensing approaches for monitoring radionuclide contamination in the soils surrounding waste disposal facilities. Specifically this proposal focuses on the development of an approach for detecting… more
Abstract:DESCRIPTION (provided by applicant): Current practice in the USA for inoperable esophageal cancer is a palliative treatment using metal stent for end-stage cancer patients. Outside the USA (especially in Far East countries including China and Korea), therehave been reported clinical benefits of… more
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