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(38,288 articles)
Popular News
Passive IR Spectroscopy Monitors Volcanic Gases
Apr 1, 1999 — One of the most a ctive volcanoes in the world could provide researchers with important insights into processes deep within the Earth and lead to more accurate forecasts of eruptions. The problem with studying volcanic gases is the need for direct sampling, often performed inside the volcanic crater -- a dangerous and often fatal operation. An alternative is using spectroscopy from an aircraft or the rim of a crater. Even though these distances are somewhat safer, lives would be in peril if a...
Small World Photo Competition Seeks Entries
Apr 1, 1999 — Nikon Inc. is soliciting entries for its 25th Annual Nikon International Small World Photo Competition. Each participant may submit up to three 35-mm transparencies of photos taken through a light microscope. Digitally captured photos are accepted,...
Lasers Bond Difficult Plastics
Apr 1, 1999 — Researchers have devised a laser technique that bonds thermoplastics without using environmentally unfriendly pretreatments. The method -- developed by the Warwick Manufacturing Group at the University of Warwick -- promises to take less time and...
Laser Imaging Sees the Pulse Racing
Apr 1, 1999 — A laser imaging system is helping researchers to better understand how blood flows through an artificial heart. Researchers use particle image velocimetry to study blood flow through a mechanical heart, and to pinpoint areas that could cause blood...
Lasers Make Rails Safer for Travel
Apr 1, 1999 — Researchers at the US Department of Energy's Argonne National Laboratory have developed a laser glazing technique that could reduce costs, pollution and danger in railroad systems. Rails are plagued with subsurface cracks that multiply parallel...
Adaptive Optics Maps out Retina
Apr 1, 1999 — Researchers at the University of Rochester have turned Star Wars-era technology designed to clarify images from spy satellites into a method that can image the human retina, with surprising results. "With this method, we can now go from imaging...
Software Enhances Grainy Security Videos
Apr 1, 1999 — The images are familiar: a burglar caught in the act by a convenience store's security camera. As useful as these security tapes are, they are often too grainy to erase doubts about a suspect's identity. A software package developed by the US...
Spacecraft Captures Flyby Images
Apr 1, 1999 — Almost three years after its launch in February 1996, the multispectral imager onboard NASA's Near Earth Asteroid Rendezvous spacecraft imaged its eventual orbiting partner, the siliceous asteroid 433 Eros in an unintended flyby. A December 1998...
Light Stamp Simplifies Lithography
Apr 1, 1999 — As the semiconductor industry struggles to expand optical lithography's capabilities and decide on the next-generation tool, one research group has come up with an alternative. A team at the IBM Zurich Research Laboratory has developed a relatively...
Interferometric Switch Overcomes Limitations
Apr 1, 1999 — Despite improvements in conventional semiconductor optical amplifier-based interferometric switches used for telecom applications such as demultiplexing and add/drop multiplexing, limitations remain. These switches suffer from poor linearity,...
Tissue Welding Gets Helping Hand
Apr 1, 1999 — Tissue welding is a laser-based surgical technique that is still in the research stage, and several groups are involved in exploring and improving the method's viability. Researchers at Lawrence Livermore National Laboratory have developed a device...
Tyco Submarine Systems Achieves 640 Gb/s per Fiber
Apr 1, 1999 — Tyco Submarines Systems Ltd., based in Morristown, N.J., has demonstrated in a laboratory experiment transmission of 64 10-Gb/s WDM channels on a single fiber path over a distance of 7200 km, representing an overall capacity of 640 Gb/s per fiber....
Researchers Unveil Ultrafast, All-Optical Switch
Apr 1, 1999 — Ultrafast, all-optical switches have generated a lot of interest for future optical communication systems and optical processing, particularly in their application in optical demultiplexers for time-division-multiplexed communications. A group...
Laser Camera Illuminates Ultrasonic Waves
Apr 1, 1999 — Conventional ultrasound techniques require that a transducer be attached to a sample surface for both signal generation and detection. Laser ultrasound, which uses one laser pulse to generate a signal and another to detect small surface...
EG&G to Pick up Division from Perkin-Elmer
Apr 1, 1999 — EG&G Inc. plans to acquire Perkin-Elmer's Analytical Instruments Div. for $425 million. The acquisition should enable EG&G to bolster its existing instruments and life sciences units. The Perkin-Elmer division produces systems that help to ensure...
Two Indicted for Exporting Fiber Optic Gyroscopes
Apr 1, 1999 — A federal grand jury has indicted a naturalized Canadian citizen and a Chinese national in connection with an effort to export fiber optic gyroscopes from Massachusetts to China. US Customs Service agents arrested Collin Xu, 33, of Montreal and Yi...
Lucent Commercializes 40-Gb/s Systems
Apr 1, 1999 — MCI WorldCom will test a single-laser transmission system capable of sending 500,000 simultaneous phone calls per second over one fiber optic cable. The maximum capacity of most current systems is 10 Gb/s. Lucent Technologies Inc. is touting its...
Molecules May Enable 3-D Optical Data Storage
Apr 1, 1999 — Highly efficient two-photon absorbing polymers may eventually be used for 3-D optical data storage and myriad other applications including biomedical imaging. A group led by Joseph W. Perry and Seth R. Marder of the University of Arizona at...
Partners Deliver 980-nm Pump Modules for Undersea Use
Apr 1, 1999 — SDL Inc. and Alcatel Optronics will deliver high-power 980-nm pump modules for deployment in undersea communications networks. Alcatel builds the modules, and SDL supplies the 980-nm semiconductor laser chips. High-power pump modules operating at...
Satellite Spins out of Control
Apr 1, 1999 — A recently launched satellite spun out of control March 5, leaving NASA officials scrambling to find a way to salvage the $67 million mission. The Wide-Field Infrared Explorer satellite apparently began spinning as a result of hydrogen gas venting...
Lessons from the Battlefield: Technology Transfer Cuts Both Ways
Apr 1, 1999 — As an industry, photonics can testify to the value of technology transferred out of the military. Charge-coupled devices, diode lasers and infrared imaging all owe much of their early development to defense basic research fueled by the Cold War and...
(Emerging Technologies) Lasers:
Apr 1, 1999 — Industrial and consumer applications in abrasives and machine tooling have used man-made diamond -- the hardest known material -- for more than 40 years. More recent research using lasers to create faster, more efficient methods for making superhard...
Fiber Optics Finds a Limit
Apr 1, 1999 — Several optical effects can degrade the signal quality of optical transmission over silica glass fiber. The more well-known mechanisms, such as attenuation and chromatic dispersion, are linear in nature and can be accurately predicted. Other...
A Light-Speed Defense Against Mach-Speed Missiles
Apr 1, 1999 — The proliferation of short- and long-range missiles did not end, as some hoped, with the Cold War. As Iraq and North Korea have illustrated, modern missile technology can lend first-class military power to poor and developing nations. Consequently,...
Night Vision:
Apr 1, 1999 — General Motors is including a night-vision system with its newest Cadillacs, a breakthrough in mass consumer applications for a technology that has been under development for more than 50 years -- primarily for military use. From the introduction of...
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