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SBC: METROLASER, INCORPORATED Topic: AF15AT38
ABSTRACT: An unseeded measurement technique is proposed for simultaneous spatially-resolved measurements of density, temperature, and velocity in hypersonic wind tunnel flows with the future potential for time-resolved measurement capability. A variant of filtered Rayleigh scattering (FRS) will be developed that takes advantage of unique monotonic relationships between molecular vapor cell filter ...STTR Phase I 2015 Department of DefenseAir Force
SBC: METROLASER, INCORPORATED Topic: AF16AT06
A diagnostic is proposed for obtaining instantaneous three-dimensional volumetric distributions of density in a flow field at velocities ranging from subsonic to supersonic. Two variants of laser-based Rayleigh scattering will be investigated, each of wh...STTR Phase I 2016 Department of DefenseAir Force
Validation Experiments to Measure Transient Aerothermoelastic Response of a Curved Panel to Hypersonic FlowsSBC: METROLASER, INCORPORATED Topic: AF16AT24
An experiment to obtain validation data on the transient aerothermoelastic response of a curved panel in hypersonic flows will be designed and evaluated for its feasibility. Significant challenges must be overcome for a successful experimental campaign i...STTR Phase I 2016 Department of DefenseAir Force
SBC: METROLASER, INCORPORATED Topic: AF16AT06
A diagnostic is proposed for obtaining instantaneous three-dimensional volumetric distributions of density in a flow field at velocities ranging from subsonic to supersonic. Multiple Sheet Filtered Rayleigh Scattering (MSFRS) will be developed, which enables a series of two-dimensional images to be rapidly obtained making up a volumetric image while suppressing background scattering from wind tunn ...STTR Phase II 2018 Department of DefenseAir Force
SBC: PHYSICAL SCIENCES INC. Topic: AF14AT13
Physical Sciences Inc. (PSI) and the research group of Professor Richard Osgood at Columbia University propose to develop a compact optical transceiver based on devices fabricated on a complementary metal-oxide semiconductor (CMOS) platform. The recent development of novel integrated structures in silicon including waveguides, resonators, and photodetectors will enable dramatic reductions in size, ...STTR Phase II 2016 Department of DefenseAir Force
SBC: PHYSICAL SCIENCES INC. Topic: AF18AT011
Physical Sciences Inc. (PSI) proposes the development of a composite laminate cathode coating based largely on consumer off the shelf (COTS) industrial materials functionalized to possess a low work function, negative electron affinity surface. The cathode coating is applicable to any surface of a spacecraft, regardless of shape or material, and allows passive one wire operation for spacecraft cha ...STTR Phase I 2018 Department of DefenseAir Force
Orientation-patterned Semiconductor Crystals with Low Insertion Loss and High Resistance to Laser DamageSBC: PHYSICAL SCIENCES INC. Topic: AF18AT016
The Air Force needs tunable laser systems with high average power in the mid-infrared region of the spectrum for military applications including defense against heat-seeking missiles.Currently-fieldedlaser systems, based on nonlinear frequency conversion in periodically poled lithium niobate (PPLN), have limited optical power at wavelengths between 4 m and 5 m because of intrinsic absorption in th ...STTR Phase I 2018 Department of DefenseAir Force
SBC: PROSENSING INC. Topic: AF17CT01
This Phase I STTR proposal describes the development of a dual frequency millimeter-wave sun tracking radiometer designed to measure total atmospheric attenuation from ground level to the top of the atmosphere.The suns brightness temperature, which is on the order of 10,000K at millimeter-wavelengths, provides an ideal background reference allowing high dynamic range estimation of total atmospheri ...STTR Phase I 2018 Department of DefenseAir Force
SBC: FREEDOM PHOTONICS LLC Topic: AF14AT13
ABSTRACT: In this effort, Freedom Photonics will develop a high-sensitivity high-resolution coherent imaging system based on a Si avalanche photodiode (APD) array and corresponding bias and read-out electronics. This will be a monolithic APD and ROIC (readout-integrated-circuit) focal plane array (FPA) system. We start from a proven high-performance CMOS electronics backplane and build the photon ...STTR Phase I 2015 Department of DefenseAir Force
Laser and Rapid-thermal Crystalization of GeSn and SiGeSn layers for IR detectors and Si-based OE devicesSBC: FREEDOM PHOTONICS LLC Topic: AF16AT28
Advanced infrared imaging techniques are of great interest but associated high costs of III-V and II-VI SWIR and MWIR materials prohibit their widespread deployment and integration with other optoelectronic devices. Freedom Photonics and its team partner...STTR Phase I 2016 Department of DefenseAir Force