Award Data

In the proposed effort, we will leverage this extensive experience and capabilities to realize a frequency agile mmW radiometer that can cover the range of DC-110 GHz and can be scaled to DC-200 GHz under Phase II. Ours is a photonic system that multiplies and up-coverts a low-frequency reference signal onto an optical carrier (laser) using EO modulation, then uses the modulation sidebands to inj ...

Training in the symptoms of Spatial Disorientation (SD) has shown to be valuable in aiding pilots to recognize its onset and provide a means for mitigating its effects, but such demonstrations have traditionally been associated with specialized equipment and devices. Since the vast majority of pilots for the commercial aviation jet fleet are trained (or recertified) on 6-degree-of-freedom (DOF) h ...

This Small Business Innovation Research Phase I program will determine the practicality of increasing the second harmonic (SH) output of frequency doubling devices by at least 5 times current gutput powers. Altos has demonstrated in preliminary experiments have a 2 times to 3 times increase in SH output by creating thermal gradients across the waveguide structures used to frequency double the lase ...

We propose exploratory development of new epitaxial growth technologies for low-defect GiN epitaxial structures and surrogate substrates. A significant feature of our approach is epitaxial latval overgrowth for "defect filtering." We present arguments that such epitaxial lateral overgrowth will lead to GaN material of unprecedented quality with respect to defects, stress, and purity. In the Phase ...

The use of UV LEDs for creating visible light by exciting commercially available phosphors will be explored. LEDs based on the (InAlGa)N materials system, now currently used to produce high brightness blue and green LEDs, will be developed to emit efficiently at UV wavelengths corresponding to the excitation bands of various phosphors. By using UV emission from LEDs to excite standard phosphors to ...

Silicon carbide (SiC) is an attractive material for use in high power and high temperature devices. Currently, there are significant challenges for the growth of large area epitaxial films of SiC. We are proposing to develop novel growth systems and growth processes for the large area growth of SiC. In our approach, we will increase the uniformity of Si/C ratios and temperature at the growth inter ...

For many miltary applications, normal photoconductors and junction photodiodes are not sufficiently sensitive for detection of low incident light levels, therefore photodetector devices with optical gain are required. Large gains can be obtained in avalanche photodiodes (APD) with both low noise and large bandwidth. It is proposed to develop innovative AlGaN/GaN based APDs. In order to achieve the ...

We propose to develop a broadly tunable all solid-state laser system able to address any wavelength between 200 nm and 10 um at average power levels of several watts. This laser source will be useful for remote sensing applications including laser induced flourescence and backscattering, doppler lidar, interferometry, and coherent imaging. The proposed laser system will be based on a combination ...

Knowledge is today's most valuable resource. The Information Age has unleashed strategic imperatives for knowledge tools capable of managing inJormation overload--too much information arriving too fast for the brain to absorb unassisted. Unless presented effectively, a deluge of data will obscure the vantage point which topsight--a central understanding of the 'big picture'-requires. METAPHOR MIXE ...

Recent preliminary research results have shown, (a) that misconfiguration bugs are an important source of vulnerability in enterprise network and software installations, and (b) how it may be possible to construct practical and useful tools that cyber security managers can use to analyze the security of their enterprise network and software configurations. This rsearch prototype analyzes the curre ...