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Research & Technology News
US Air Force Tests Beam-Control System
Nov 1, 1999 — Researchers from the Directed Energy Directorate of the US Air Force Research Laboratory at Kirtland Air Force Base, N.M., have completed a three-month, dynamic compensation experiment that tested the ability of a laser beam control system to correct for the distorting effects of optical turbulence. The immediate beneficiary of the study is the Airborne Laser Program, which is designed to eliminate theater ballistic missiles from more than 200 nautical miles away. The program manager...
Virtual Waveguide Offers a Real Optical Switch
FAYETTEVILLE, Ark. -- FAYETTEVILLE, Ark. -- Waveguides used as optical switches do not lend themselves easily to reconfiguration. But researchers at the University of Arkansas may have found a way around these rigid structures. By applying a direct current electric field...
2-m Telescope Takes Its First Look
Oct 1, 1999 — EOS Technologies Inc. (EOST) in Tucson, Ariz., hosted a "first light" party to demonstrate the research potential of its 2-m-aperture telescope before its permanent installation next year. The instrument is destined for an observatory on Mount...
Air Force Telescope Open to Researchers
Oct 1, 1999 — The director of the US Air Force’s Office of Scientific Research, Joseph Janni, announced that civilian astronomers will be allowed to use its 3.67-m telescope on Haleakala in Maui, Hawaii, under a two-year joint program with the National...
Airborne Laser Window Nears Completion
Oct 1, 1999 — Pittsburgh’s Contraves Brashear Systems LP has accepted the conformal window for the US Air Force’s Airborne Laser Program. The company will polish, coat and install the 340-lb, 1.8-m-diameter window in a composite turret ball from...
Algorithms Improve Spectral Imaging
Oct 1, 1999 — An imaging spectrometer in an airplane or satellite can picture the Earth’s surface while simultaneously detecting the broad range of radiation wavelengths that emanate from each pixel. More than 40 models of imaging spectrometers are in use...
Algorithms Improve Spectral Imaging
GÖTTINGEN, Germany — A team of researchers at the Max Planck Institute for Biophysical Chemistry broke the theoretical minimum for resolution by a focusing light microscope. More than 100 years ago, Ernst Abbe laid down the law that the wave nature of light limits...
Best Lasers May Be Misanthropes
ALBUQUERQUE, N.M. -- ALBUQUERQUE, N.M. -- Quantum dots are antisocial, and that’s good news for Sandia National Laboratory researchers who want to make better lasers. Quantum dots, atomic islands of material that appear on semiconductor thin films, can produce...
Camera Images the Unseen Eclipse
Oct 1, 1999 — A complementary metal oxide semiconductor (CMOS) video camera attached to a 400-mm reflector telescope produced black-and-white images of the Aug. 11 total solar eclipse with details never before seen or recorded. The device, developed by the...
Dense Wavelength Division Multiplexing Components Promise 1.7 Tb/s Transmission
Oct 1, 1999 — Researchers at Fujitsu Laboratory Ltd. in Richardson, Texas, a division of Fujitsu Network Communications Inc., have developed components that the company says will enable its 320-Gb/s Flashwave dense wavelength division multiplexing system to...
Fiber Optics Keeps the Fleet Shipshape
ALEXANDRIA, Va. — Researchers at Systems Planning and Analysis Inc., with funding from the Office of Naval Research in Arlington, Va., have produced a low-cost fiber optic network that will monitor the structural fitness of the US Navy’s fleet.The system, which...
FireMapper Gets Set for Flight
Oct 1, 1999 — The FireMapper multispectral radiometer is being prepared for airborne deployment next year by the US Department of Agriculture’s Forestry Service. The device, manufactured by Space Instruments Inc. of Encinitas, Calif., monitors long-wave...
German Researchers Employ Fiber Laser to Weld a Fine Seam
Oct 1, 1999 — Scientists from the Laserzentrum Fachhochschule Münster in Steinfurt, Germany, and the Technische Universitat Chemnitz reported that they seam welded stainless steel foil with a joint smaller than 70 µm. They employed a fiber laser that...
Green Organic LED Shows High Efficiency
LOS ANGELES -- LOS ANGELES -- An organic light-emitting diode (LED) that relies on electrophosphorescence may prove a breakthrough in organic LED efficiency, with quantum and power efficiencies reaching 8 percent and 31 lm/W, respectively. The green device,...
Human Vision Simplifies Sensing Technique
BALTIMORE — A fluorescence detection method that uses the human eye as a key component promises to take fluorescence analysis out of the laboratory and into the field.Developed by scientists at the Center for Fluorescence Spectroscopy at the University of...
Hybrid Laser Expands Imaging Range
SAN DIEGO — There is potential for a laser that simultaneously produces output at multiple wavelengths in remote sensing, environmental testing and biomedical imaging. Such a device would be a boon for the military as well; applications such as surveillance and...
Interferometer Seeks Gravity Waves
Oct 1, 1999 — A team of researchers at the California Institute of Technology in Pasadena used a laser interferometer to look for the gravity waves that Einstein predicted in his general theory of relativity. The instrument is a precursor to the national Laser...
Laser Missile-Jamming System Passes Tests
Oct 1, 1999 — A laser-based directional infrared countermeasures system that was demonstrated by Northrop Grumman Corp.’s Electronic Systems and Sensors Sector in Rolling Meadows, Ill., passed 10 hours of flight tests that simulated five missile defense...
Laser Optics Improve Gasoline Yield
ARGONNE, Ill. — Fluid catalytic cracking of oil feedstocks produces a large portion of the US gasoline supply. This process relies on dispersion-steam-assisted nozzles to atomize the feedstocks. Thus, optimizing nozzle properties, including the degree of...
Lasers Break an Optical Barrier
GÖTTINGEN, Germany — A team of researchers at the Max Planck Institute for Biophysical Chemistry broke the theoretical minimum for resolution by a focusing light microscope. More than 100 years ago, Ernst Abbe laid down the law that the wave nature of light limits...
Lasers Jump-Start Catalytic Research
BERLIN — How do you study chemical processes that last only an average of 100 femtoseconds? And how do you ensure that you are observing just the effects of that particular activity?Researchers at the Fritz Haber Institute of the Max Planck Society solved...
MOEMS Advance
MAINZ, Germany -- MAINZ, Germany -- Researchers discussed developments and obstacles at the Third International Conference on Micro Opto Electro Mechanical Systems (MOEMS). Organized by the Institut fur Mikrotechnik Mainz GmbH, it highlighted growing applications,...
Monolithic Mosaic Gratings Are Ready for Subaru Telescope
Oct 1, 1999 — Richardson Grating Laboratory of Rochester, N.Y., completed the production of three mosaic diffraction gratings for the recently constructed Subaru telescope atop Mauna Kea in Hawaii. The monolithic gratings will operate in the UV, VIS and near-IR...
Multimode Fiber Transmits at 10 Gb/s and over 3000 m
Oct 1, 1999 — Separate tests performed on the 50-µm InfiniCor multimode fiber, which is produced by Corning Inc. of Corning, N.Y., demonstrated serial transmission at 10 Gb/s over 600 m and at Gigabit Ethernet speeds over 3000 m. The InfiniCor fiber is...
Optical Holes Produce Better Memories
PHILADELPHIA — With today’s technology, compact discs hold about 1 bit of information per square micron. Associate professor of physics Zameer Hasan and colleagues at Temple University have devised a way to increase this storage capacity by three orders of...
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