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  • Nuclear Solutions' Semiconductor Laser-Based Detector Awarded Patent
Aug 2007
Washington-based Nuclear Solutions Inc. (NSOL) announced that it was awarded a US patent for technology it is developing to detect shielded nuclear weapons. The patent covers a detection technique based on semiconductor-laser mode hopping, triggered by the gravitational interaction with high specific-density nuclear materials. NSOL said its approach appears to have the potential to improve significantly on gravitational gradiometry techniques previously developed by Los Alamos National Laboratory, the University of Maryland and The Jet Propulsion Laboratory. "This newly allowed patent positions NSOL to pursue funding opportunities and subsequent commercialization of the technology on a more aggressive schedule. We have invested over four years developing this concept. We feel a great deal of satisfaction that our efforts have come to fruition," said NSOL President and CEO Patrick Herda.

1. A device designed to convert the energy of incident radiation into another form for the determination of the presence of the radiation. The device may function by electrical, photographic or visual means. 2. A device that provides an electric output that is a useful measure of the radiation that is incident on the device.
mode hopping
Sudden shift of the laser diode output beam from one longitudinal mode to another during single-mode operation. Mode hopping can occur from several complex factors intrinsic to laser systems, however two common causes of mode-hopping are temperature and the use of unstable power sources.
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
semiconductor laser
A semiconductor material which is designed and grown for the efficient production of short wavelength stimulated emission through high gain as well as low internal losses. Materials with band gap energies which emit radiation efficiently within the desired wavelength region are used. Diodes may emit vertically in relation to the laser material junction in a VCSEL configuration or horizontally in an edge emitting configuration. Synonymous with laser diode.  Sometimes used...
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