Award Data

This proposal describes a fabrication-intensive program to determine the feasibility of fabricating oxide vertical-cavity surface-emitting lasers (oxide VCSELs) whose unoxidized current apertures comprise lateral oxidation barriers. Although oxide VCSELs have spectacular performances (50% wallplug efficiency, etc.) their manufacturability is questionable since the oxidation process forming the cur ...

The overall objective of the Phase I and Phase II program is to develop a prototype airwake measurement system that offers substantially - improved capability for measuring and developing models of the wind environment for ship-board landing of helicopters. The proposed Phase I study will carry out a survey of airwake data characteristics of various as-sea helicopter landing environments with pri ...

Ultrafast imaging is an important need for the development, control and evaluation of modern air-deliverable weapons systems. Recent advances in optical imaging such as speckle interferometry can potentially improve DoD capability to deliver munitions and armaments to targets at long ranges, and under adverse seeing conditions. Moderate density arrays of at least 100 x 100 pixels, and frame rate ...

41349 November 20, 1996 Green Development Thin film cadmium telluride technology manifests potential advantages over competing photovoltaic (PV) technologies, such as economy of manufacturing over large areas and high stabilized efficiency. Yet, present day, large area cadmium telluride (CdTe) module efficiencies (7-8%) lag far behind laboratory scale dev ...

This proposal describes a program to determine the feasibility of forming an entirely new class of optical structures: wide-angle resonant cavities (WARCs). A WARC-structured light emitting diode would have "laser-like" high efficiency and modulation speeds. A WARC-structured vertical cavity laser would have low threshold currents and extremely high speeds. The device characteristics sought are si ...

This proposal describes an experimental program to determine the feasibility of fabricating long-wavelength (>1.3um) oxide vertical-cavity surface-emitting lasers (VCSELs). It addresses the two most inhibiting difficulties in fabricating practical long-wavelength VCSELs: 1) Use of oxidized layers in the bottom mirror results in a mirror thickness reduction from ~7um to

With the increasing demand for high temperature cryoelectronics and sensitive spaceborne multi-spectral imaging and detector systems, reliable mechanical cryocoolers have become an enabling technology. These cryocoolerscollers share two undesirable characteristics, vibration and heat generation. Vibration reduction has focused on multi-harmonic axial vibration cancellation using active counterba ...

SOCOM needs powerplants that can combine the power density of gasoline fueled engines with the lowered fire hazard and logistical simplicity of Diesel fueled engines. The primary application is an outboard motor with a nominal rating of 55 hp. This engine also has applications for ultralight aircraft, marine and other platforms throughout the military. There are no commercially available produc ...

Owen Research November 4, 1996 40016 The characterization of particulates and three-dimensional fluid flow in the subsea environment is central to understanding and monitoring energy related material transport in the marine ecosystem. However, detailed particulate characterization is difficult with current technology, which uses microscopy optics, because unres ...

There is currently no single cost-effective technological solution to the problem of land mine detection and location in a variety of field conditions. Ground Penetrating Radar (GPR) is a useful technology in many environments, but its application in wet soil conditions is limited, especially for detection of small, anti-personnel devices. Like most imaging methods, GPR imaging cannot provide hi ...