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(38,299 articles)
Popular News
Quantum Cascade Laser Operates at Room Temperature
Jun 1, 2001 — Researchers from Thales Corporate Research in Orsay, France, have developed a GaAs-based quantum cascade laser that operates at room temperature. Since their development in 1995, quantum cascade lasers have found applications in gas sensing and infrared spectroscopy. GaAs-based devices had been limited to operation at cryogenic temperatures, but the Thales group found that epi-side-down mounting improved thermal dissipation. The new 11.5-µm lasers, which were thermoelectrically cooled,...
CoO Infiltration Enhances YIG Films
Jun 1, 2001 — A team at the National Physical Laboratory in New Delhi, India, has developed films of infiltrated yttrium iron garnet that promise applications as high-density magneto-optical recording media, waveguides and modulators in integrated optical...
Cosmos 1 Solar Sail Delayed
Jun 1, 2001 — An accident during prelaunch testing has delayed the test flight of the Cosmos 1, which was developed by Babakin Space Center in Moscow for The Planetary Society of Pasadena, Calif. The solar sail remains scheduled for late September or early...
Acousto-Optic Effect Studied
Jun 1, 2001 — Gradients of acoustic pressure in nematic liquid crystal, known as acoustic streaming, are responsible for the acousto-optic effect, according to researchers from Chung Yuan Christian University in Chung-Li and National Chao Tung University in...
Lidar Finds Fish from the Air
BOULDER, Colo. -- BOULDER, Colo. -- Since antiquity, man has pondered the question: How many fish are lurking in the waters below? Getting an accurate picture of a fish population is still a challenge to the fishery manager who must set catch limits so as not to...
Photochemical Etching Developed for GaN
Jun 1, 2001 — A wet photochemical etching technique promises to ease the production of devices fabricated from GaN-based materials, which are resistant to most chemical etches and which can display defects when dry-etched. In the March 26 issue of Applied Physics...
Gas Purifiers Improve Film Growth
Jun 1, 2001 — Aeronex Inc. of San Diego has announced the completion of a one-year study with the University of California in Santa Barbara into the impact of gas purification systems on metallorganic chemical vapor deposition. According to the researchers, gas...
Night-Vision Goggles Spot Radiation
WARRINGTON, UK -- WARRINGTON, UK -- Tinkering with an old phenomenon in physics, designers are tackling a modern danger. They have retooled military night-vision goggles to see alpha radiation through scintillation, the effect discovered by Ernest Rutherford wherein...
Lidar Takes the Sky’s Temperature
URBANA, Ill. -- URBANA, Ill. -- For climatologists, a key question isn’t how high is the sky, but how hot is the sky. Understanding the temperature of various levels of the atmosphere is essential to developing global climate models. Now lidar, a photonics...
Machine Vision Aids Lifeguards
BEVERLY, Mass. -- BEVERLY, Mass. -- Despite their best efforts, lifeguards cannot monitor every swimmer in a loud, busy pool. According to the US Centers for Disease Control and Prevention, an average of six people drown daily in US pools, and drowning is the second...
Micro-Optics Enable Microsatellites
IRVINE, Calif. -- IRVINE, Calif. -- Microsatellites are gaining acceptance in the aerospace community as potential replacements for conventional satellites. These spacecraft can be as small as a Coca-Cola bottle, so it would be far less expensive to deploy them. One...
Wrinkling Puts Light Mirrors in Doubt
Jun 1, 2001 — Engineers may have to look elsewhere for lightweight mirrors for the next generation of space telescopes. A research team at the University of Arkansas in Fayetteville has determined that the polymer films proposed for large, inflatable mirrors...
Handwashing Olympics Highlights Hygiene
WASHINGTON -- WASHINGTON -- According to the US Centers for Disease Control and Prevention, dirty hands are responsible for 25 percent of food-borne illnesses, or 75 million annually, and for 5000 deaths in the US every year. To raise awareness of the problem and...
International Sematech to Upgrade Microstepper
Jun 1, 2001 — International Sematech of Austin, Texas, a consortium of 13 semiconductor chip manufacturers, has announced plans to upgrade its 157-nm microstepper from Exitech Ltd. of Oxford, UK. The incorporation of a 0.85-NA objective should enable the system...
Laser Measures Shiny Objects in 3-D
OKAYAMA, Japan -- OKAYAMA, Japan -- Laser rangefinders can be used to precisely determine the three-dimensional shapes of objects, but only if the objects display lambertian reflection. Now researchers at Okayama University have developed a system that can measure...
Vision System Identifies Sleepy Drivers
ACTON, Australia -- ACTON, Australia -- Car accidents happen in the blink of an eye, and the more that eyes blink or wander, the greater the chance for an accident. According to carmaker AB Volvo of Göteborg, Sweden, driver fatigue and inattention are responsible...
Single-Molecule Study Exposes Glass Dynamics
AUSTIN, Texas -- AUSTIN, Texas -- Glasses and noncrystalline materials have been important to humans for thousands of years, but scientists have been at a loss to explain what is going on as these materials cool from liquids into amorphous solids. Using a new...
Fluorescence Sampling Targets Oil Spills
DHAHRAN, Saudi Arabia -- DHAHRAN, Saudi Arabia -- Oil spills happen nearly every day throughout the world, but only a fraction are highly publicized. Lesser spills are far more frequent, most occurring when tankers discard oil during ballasting and other routine operations....
Thermal Imager Passes Test
Jun 1, 2001 — The Aero 20/2X thermal imaging system designed for law enforcement, aerial inspection, and search and rescue applications has successfully completed its initial flight test aboard an OH-58 helicopter. Developed by Sagebrush Technology Inc. of...
Tweezers May Power Micromachines
ST. ANDREWS, UK -- ST. ANDREWS, UK -- A team at St. Andrews University has demonstrated a variant of optical tweezers that can cause micron-size objects to rotate. The technique could be used to drive miniature cogs and motors in micromachines or to orient DNA strands...
Two Fibers Enhance Monitoring
MILWAUKEE -- MILWAUKEE -- Fiber optic sensors containing probes that react to a triggering event such as a chemical spill can guard against widespread pollution from industrial plants. However, the fluorophores must be separated to accurately monitor their...
Agere Systems Announces Industry’s Lowest-Voltage, Highest Bandwidth 40-Gb/s Modulator for Optical Networks
ALLENTOWN, Pa. -- ALLENTOWN, Pa. -- Agere Systems announced the industry’s lowest-voltage, highest-bandwidth lithium niobate modulator for use in 40-Gb/s optical networking systems. With this component, systems makers can more economically design a system that...
Agere Systems Announces Industry’s Most Powerful Distributed Feedback Raman Pump Lasers for 10- and 40-Gb/s Optical Networks
ALLENTOWN, Pa. -- ALLENTOWN, Pa. -- Agere Systems, a provider of communications semiconductors, announced the industry’s most powerful 14xx nm distributed feedback (DFB) Raman pump lasers used to boost signal power in ultra-high capacity optical networking...
Agere Systems and RF Micro Devices Announce Strategic Alliance
ALLENTOWN, Pa. and GREENSBORO, N.C. -- ALLENTOWN, Pa. and GREENSBORO, N.C. -- Agere Systems and RF Micro Devices Inc. announced that they have signed definitive agreements to form a strategic alliance to develop, design and manufacture high-performance chips for next-generation,...
Lucent Technologies Microelectronics Spinoff Selects a Name
ALLENTOWN, Pa. -- ALLENTOWN, Pa. -- Lucent Technologies announced that its Microelectronics spinoff has selected Agere Systems as its name. The company, which is the former Microelectronics Group of Lucent Technologies, is the world leader in semiconductors for...
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