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(38,320 articles)
Popular News
Consortium Aims to Revitalize Telecom
Sep 1, 2002 — A telecommunications network is a complex web of optical fiber, routers, amplifiers, waveguides, gratings and resonators that have a wide range of performance characteristics. Optical engineers who are working to refine this network need tools to help them create complementary systems that exploit these different parameters. RSoft Design Group Inc., Science Applications International Corp. and its wholly owned subsidiary Telcordia, as well as Columbia University and IBM's T.J. Watson...
Company Awarded Contracts for IR Sensors
Sep 1, 2002 — Canada-France-Hawaii Telescope (CFHT) and Gemini Observatory have awarded Rockwell Scientific Co. LLC two $2.2 million contracts to produce molecular beam epitaxy mercury cadmium telluride 2048 X 2048 short-wave IR sensor chip assemblies on...
Teem Buys Northstar's Amplifier Technology
Sep 1, 2002 — Teem Photonics Inc., a developer of erbium-doped waveguide amplifiers and a provider of ultracompact components for high-bandwidth optical networks, has acquired the technology of Minneapolis-based Northstar Photonics Inc. in an undisclosed cash...
Edmund to Supply Binocular Eyepieces for Tanks
Sep 1, 2002 — Edmund Industrial Optics has been awarded a contract by Northrop Grumman to provide 580 binocular eyepiece assemblies for use in tanks. Each assembly comprises five lenses and a high-precision mirror. Edmund will create the entire assemblies, from...
Cambridge Lasers Buys the Assets of Lexel Laser
Sep 1, 2002 — Cambridge Lasers Laboratories Inc. of Fremont, Calif., has bought a major portion of the assets of Lexel Lasers Inc., also of Fremont, including the parts inventory, most of the manufacturing equipment and all of the intellectual property. The...
Multisource Agreement Formed to Standardize Transceiver Modules
Sep 1, 2002 — Agilent Technologies Inc., Nortel Networks and Agere Systems have agreed to establish standard specifications for the production of 2.5-Gb/s dense wavelength division multiplexing transceiver package outlines, pin function definitions, software...
Lidar Measures Wake Vortices
Sep 1, 2002 — When a large passenger aircraft takes off or lands, it displaces a sizable volume of air that trails off the wings in a phenomenon known as a wake vortex. This invisible wake whirls up to 100 mph, leaving behind a horizontal tornado with a position...
Ultrafast Measurement Leaps Forward
Sep 1, 2002 — Ultrafast lasers have applications in telecommunications, microlithography and genetic sequencing. However, their intensity and phase vs. time have always been difficult to measure. In addition, femtosecond pulses are often plagued with spatial...
A New Angle on Fish Canning
Sep 1, 2002 — Existing technology for controlling the desired net weight of canned salmon relies on volumetric principles, which can introduce unacceptable errors. Although computer tomography, positron emission tomography and magnetic resonance imaging offer...
Researchers Measure Vibrationally Excited Water
Sep 1, 2002 — At a minimum, predicting the absorption spectrum for water vapor requires a set of line positions and intensities and a shape function. Line intensities can be determined from a dipole moment surface, but a team of researchers from École...
Textured Aperture Beats Diffraction
Sep 1, 2002 — According to the theory of diffraction, an aperture strongly suppresses the transmission of light through it as its diameter falls to half the wavelength. Moreover, the transmitted light will be highly divergent. An international team working with...
Quantum Dots Suited for Computing?
Sep 1, 2002 — Quantum dots are promising candidates to replace the trapped atoms originally posited as the backbone of quantum computing, but it must be possible to manipulate and measure their quantum states. Now researchers at Technische Universität München in...
Spectroscopy Works with Single Pulse
Sep 1, 2002 — Physicists at Weizmann Institute of Science in Rehovot, Israel, have demonstrated that a single tailored laser pulse can replace the two or three typically required in coherent anti-Stokes Raman spectroscopy and microscopy. Described in the Aug. 1...
LEDs Emit Orange for White Light
Sep 1, 2002 — Researchers at National Cheng Kung University, Chung Shan Institute of Science and Technology, Nan-Jeon Institute of Technology and Chin-Min College, all in Taiwan, have developed ZnCdSeTe-ZnSSe multiple-quantum-well LEDs that promise to enable...
Microlenses Enable Quantum Computing
Sep 1, 2002 — Researchers at the University of Hannover in Germany demonstrated atomic computing based on an experimental micro-optical system. The system, described in the Aug. 26 issue of Physical Review Letters, directed light from an amplified diode system...
Cr:LiSAF Laser Yields Femtosecond Blue Pulses Blue Pulses
Sep 1, 2002 — A femtosecond Cr:LiSAF laser emitting 12 mW of blue light has achieved much higher electrical-to-optical efficiencies than Ti:sapphire sources. Demonstrated by researchers at St. Andrews University in the UK, the laser converted 1 percent of its...
Single Laser Writes Inside Glass
Sep 1, 2002 — Scientists at Japan Science and Technology Corp. in Kawasaki and at Tokyo Institute of Technology in Yokohama, Japan, have demonstrated a holographic technique that writes structures inside glass using a single laser. The work may find use in 3-D...
Single Molecules Display Electroluminescence
Sep 1, 2002 — Scientists at Georgia Institute of Technology in Atlanta have coaxed photons from individual molecules. The nanometer-scale light sources, which were reported in the Aug. 6 issue of the Proceedings of the National Academy of Sciences, may find a...
Portable Technique Could Detect Anthrax
Sep 1, 2002 — A proposed form of coherent anti-Stokes Raman spectroscopy shows promise in distinguishing anthrax spores from other organic compounds. Like conventional anti-Stokes Raman techniques, the procedure would apply two laser pulses to heighten coherence...
Spectroscopy Tracks Vibrational Energy in Liquids
Sep 1, 2002 — Using ultrafast anti-Stokes Raman spectroscopy, chemists at the University of Illinois in Urbana-Champaign have developed a spectroscopic method for tracking the flow of vibrational energy through the chemical bonds of molecules in the liquid state....
Amplifier Switching Time Shortened Tenfold
Sep 1, 2002 — A technique that makes "turn on/turn off" switching times for network semiconductor optical amplifiers 10 times faster has been developed by researchers from the University of Campinas in Brazil. The group added 150-ps electrical pulses to the...
Laser Tweezers Rotate Microscopic Rotors
Sep 1, 2002 — Researchers at the Institute of Biophysics in Szeged, Hungary, have employed laser tweezers to bi-directionally rotate a microscopic rotor made of a polymerized resin. The team created a rotor approximately 5 µm in diameter by performing...
Laser Produces Better Road Signs
Sep 1, 2002 — Most of us acknowledge the messages on roadway signs, and we speed by without giving them another thought. But researchers at Zhejiang University in Hangzhou, China, are working hard to improve signage technology to better catch our eye. They have...
Laser Powers Paper Airplanes
Sep 1, 2002 — A laser-based propulsion system for ultralight aircraft has been demonstrated by researchers at Tokyo Institute of Technology. The technique, which they reported in the June 10 issue of Applied Physics Letters, may find applications in the...
Opaque Layer Improves Light Output
Sep 1, 2002 — Attempting to improve an organic LED's light output by covering its top with an opaque, 50-nm-thick layer of silver may seem a little nonsensical, but the technique has allowed researchers at the University of Rochester in New York to increase the...
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August 2024
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