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(38,320 articles)
Popular News
Optical Trapping Tests Particles at Oil-Water Barrier
Sep 1, 2002 — Scientists at Hull University, the CLRC in Didcot and Imperial Chemical Industries in Middlesborough, all in the UK, have measured the repulsive force between two charged polystyrene particles in an oil-water interface as it relates to their physical separation. They used a variable-power continuous-wave Nd:YAG laser operating at 1064 nm to trap the particles, which were arranged in a monolayer at the interface between water and a mixture of decane and undecane. By varying the laser's power and...
Evidence Found for Magnetars
Sep 1, 2002 — The mysterious stellar objects known as anomalous x-ray pulsars can put out x-ray luminosities that are orders of magnitude larger than what should be produced by their rotational energy loss. One of the most popular theories for this is that the...
Laser Diode Provides High-Power Pulses
Sep 1, 2002 — Researchers have constructed a laser diode capable of generating approximately 100-W, picosecond-range pulses by using an AlGaAs layer as a potential barrier between the structure's PN junction and gain region. The barrier slows down the...
Gaussian Telescope Aperture Improves Contrast
Sep 1, 2002 — Changing the aperture of a telescope has allowed researchers from Pennsylvania State University in University Park to find a star previously hidden by a brighter star. The team, led by Jian Ge, mounted a metal disc with 12 Gaussian-shaped holes...
Quantum Cascade Laser Amplifier Developed
Sep 1, 2002 — Scientists from Bell Labs in Murray Hill, N.J., have developed an amplifier for quantum cascade lasers that can achieve high-power single-mode emission at a wavelength of 7.4 µm. They used an InGaAs/InAlAs/InP semiconductor amplifier, also based...
Researchers Probe Chemistry of Bubbles
Sep 1, 2002 — Since luminescence in single cavitating bubbles was described more than a decade ago, the phenomenon has attracted much attention from scientists. Earlier this year, interest was piqued all the more, when a team at Oak Ridge National Laboratory in...
Spectroscopy Bares Nanoparticle Structure
Sep 1, 2002 — Sometimes you need a bigger laser to study smaller particles. Specifically, a group of Dutch researchers applied a free-electron laser to study nanoparticles representing matter between the atomic and bulk states. Infrared spectroscopy...
Australian Researchers Teleport Laser Beam
Sep 1, 2002 — A team from the Australian National University in Canberra has reported the successful quantum teleportation of a laser beam using two Einstein-Podolsky-Rosen entangled laser beams. The method, which was similar to that used by California Institute...
Photons Spin More Data
Sep 1, 2002 — For years, physicists have known that photons can exhibit orbital angular momentum. Spin manifests when a photon's transverse components are out of phase, whereas orbital angular momentum affects the entire phase front of the beam. The mechanical...
Researchers Form Liquid-Light Theory
Sep 1, 2002 — Beams of light can be collimated, split or chirped -- and now, some researchers say they can even be liquefied. Based on the assumption that a laser beam can be thought of as a gaseous stream of photons, the researchers, from the Universidade de...
Clock Measures Attosecond Pulses
Sep 1, 2002 — Scientists at Université de Sherbrooke in Sherbrooke, Quebec, Canada, and at the National Research Council in Ottawa are using double ionization to measure the strength and duration of the attosecond electron pulses created by intense infrared laser...
Tweezers Serve up Condensates
Sep 1, 2002 — At temperatures just above absolute zero, normally distinct atoms collapse into each other's quantum arms, forming a single quantum wave function. These Bose-Einstein condensates could form the basis of a continuous atom laser, for example, but such...
Self-Assembly Eases Fabrication of Photonic Crystals
Sep 1, 2002 — Devices constructed of photonic crystals promise to enable the precise, localized control of optical propagation. The fabrication of such crystals usually involves a complex and expensive multistep process. However, researchers at the University of...
Tabletop Source Offers Extreme Ultraviolet
Sep 1, 2002 — Generating laserlike beams of x-rays from a simple tabletop setup, a team based at the University of Colorado's JILA in Boulder has demonstrated the ability to perform extreme-ultraviolet holography. "Lasers in the visible region of the spectrum...
Air Force Lab Extends EXFO Actuator Contract
Aug 30, 2002 — QUEBEC CITY, CANADA, August 30 -- EXFO Electro-Optical Engineering Inc. announced that its contract has been extended with the US Air Force Research Laboratory (AFRL). Funded by the US Defense Advanced Research Projects Agency (DARPA), the contract...
Navy Picks Kaman for Airborne Sensor System
Aug 30, 2002 — BLOOMFIELD, Conn., August 30 -- Kaman Aerospace's Electro-Optics Development Center (EODC) has joined a Northrop Grumman-led team that is designing and developing a rapid airborne mine clearance system (RAMICS) for the US Navy. Kaman EODC will...
Gore & Associates to Sell Fiber Optic Business
Aug 30, 2002 — ELKTON, Md., August 30 -- W. L. Gore & Associates Inc., a supplier of components for the electronic industry, has announced it will sell its fiber optic business. "We are refocusing Gore's electronic components business on high performance...
Daily News Briefs
Aug 30, 2002 — Hologic Inc., a provider of women's diagnostic imaging systems and general digital radiography systems, has been awarded a multiyear contract with the Defense Supply Center of Philadelphia. . . . Cambridge Display Technology (CDT) and GDesign...
IT to Provide DWDM System in Kwang-ju
Aug 30, 2002 — SEOUL, Korea, August 30 -- Intelligent Telecommunications (IT) recently won a contract to provide a 10 Gb/s dense wave division multiplexing (DWDM) test-bed system for Korea's Ministry of Commerce, Industry and Energy for a project based in...
Daily News Briefs
Aug 29, 2002 — Melles Griot has added a beam-measurement section to its Web site at http://beammeasurement.mellesgriot.com. Instruction manuals and demonstration software for most of the alignment, positioning and beam-profiling instruments are available for...
Forecast: MEMS Markets to Expand
Aug 29, 2002 — SANTA BARBARA, Calif., August 29 -- The microelectromechanical systems (MEMS) markets are expected to triple between 2000 and 2005, from $3.8 billion to over $11 billion, according to a new report by Peripheral Research Corp. (PRC). MEMS devices...
Rockwell Delivers VLWIR Assemblies for Satellite System
Aug 29, 2002 — THOUSAND OAKS, Calif. August 29 -- Rockwell Scientific Co. has delivered two very long wave infrared (VLWIR) sensor chip assemblies to Raytheon Co. for use on the US space-based infrared system (SBIRS) ow program. The assemblies, which detect light...
Toshiba, NEC Offer New Blue-Laser DVD Format
Aug 29, 2002 — TOKYO, August 29 -- Toshiba Corp. and NEC Corp. have proposed to the DVD Forum a next-generation, high-capacity, blue-laser DVD format that will allow manufacturers to continue to use existing DVD plant and equipment. The format covers both...
Cogent to Use CSC Philadelphia Network
Aug 28, 2002 — PHILADELPHIA, August 28 -- Cogent Communications has signed a multimillion-dollar agreement to lease dark fiber strands on City Signal Communications' (CSC) Philadelphia network. CSC will lease fiber to Cogent providing On-Net access to key...
RIAA Supports NC Fiber Optic Program
Aug 28, 2002 — EDENTON, N.C., August 28 -- North Carolina's Rural Internet Access Authority (RIAA) approved a $2.9 million grant for a fiber optic cable backbone that will stretch from Moyock to Wilmington. The fiber network, which is being built along the same...
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August 2024
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