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Research & Technology News
KVH Introduces ActiveFiber
May 1, 2001 — KVH Industries Inc. of Middletown, R.I., presented its ActiveFiber technology at OFC in Anaheim, Calif. The company said that the first ActiveFiber product would be a 40-Gb/s polarimetric modulator for 1550-nm optical communications. The technology involves the insertion of chromophore-doped electro-optic polymers into the core of a D-shaped optical fiber. When voltage is applied to the polymer, the polymer's optical characteristics change, creating a phase shift that can be used to encode...
Laser Cooling of Solids Advances
ALBUQUERQUE, N.M. -- ALBUQUERQUE, N.M. -- Since 1995, when a group of scientists discovered how to cool solids with laser light, the prospect of improving the technique has enthralled many researchers. Now a group from the University of New Mexico here and from Los...
Laser Speeds Trimming Technique
MONTREAL -- MONTREAL -- Recent advances in telecommunications have brought new challenges in integrating analog and digital components. Analog components require high accuracy, for example, which slows integration. Resistor ladders and trimming techniques on...
Laser Tested for Antimissile System
May 1, 2001 — Lockheed Martin Missiles & Space of Sunnyvale, Calif., announced that Raytheon Co. Electronic Systems of El Segundo, Calif., has conducted tests of the Airborne Laser’s Track Illuminator Laser subsystem ahead of schedule. The Yb:YAG laser...
Multiplexer Delivers 1600 Channels
COLUMBIA, Md. -- COLUMBIA, Md. -- The tighter bit density of 40-Gb/s signals makes them more vulnerable to chromatic and polarization mode dispersion as well as nonlinear optical effects. But other than laying more fiber – a solution with problems of its own – the...
Nanotubes Enable Flat Panel Displays
EVANSTON, Ill. -- EVANSTON, Ill. -- Flat panel displays are desirable where space is at a premium: in portable electronic devices and as computer monitors and television sets. While the demand is high for the displays, so are the prices. The process technology used...
Nichia Offers True Blue Laser Diodes
May 1, 2001 — Nichia Corp. of Tokyo has announced the availability of its new blue laser diodes in evaluation quantities. The NLHB500X-01 laser diode is offered at a unit price of $3000 for customers researching potential applications of the light source. The...
Optics Delivered to Fusion Research Lab
May 1, 2001 — Researchers at Osaka University’s Institute of Laser Engineering in Japan have incorporated three precision mirrors from Optical Surfaces Ltd. of Surrey, UK, into the Gekko XII laser facility. The 12-beam laser probes laser-plasma interactions...
Raman Imaging Identifies Microfossils
BIRMINGHAM, Ala. -- BIRMINGHAM, Ala. -- Micropaleontology has become a viable science only in the last four decades, but it has already enabled researchers to chart the history of life on Earth back 3.5 billion years to its emergence in the Archean.Unlike macroscopic...
Researchers Prospect for Martian Water
MOUNTAIN VIEW, Calif. -- MOUNTAIN VIEW, Calif. -- The image of John Carter’s Mars, crisscrossed with canals, has been relegated to pulp sci-fi curiosity, but there is much evidence that liquid water existed on the planet at some time. Spurred by this and the...
Sensor Classifies Demolition Waste
May 1, 2001 — Researchers at the University of Nijmegen in Nijmegen, the Netherlands, have reported that preprocessing techniques can mitigate the undesirable scattering effects that compromise the infrared analysis of demolition waste. The group, which reported...
Sensor Sniffs Out Fuel Vapors
ABERDEEN, Md. -- ABERDEEN, Md. -- Fuel vapors pose a fire hazard to crews aboard military vehicles, especially because they use a middle-distillate fuel that is similar to commercial kerosene. Now researchers at the US Army Research Laboratory have developed a...
Spectrometry Samples Crude Oil
RIDGEFIELD, Conn. -- RIDGEFIELD, Conn. -- Oil exploration requires an investment of time, money and material. But even when crude is found, questions about its composition must be answered so the type of processing it requires at the surface can be determined. A new...
Synchrotron Is Ideal Source for IR Microscopy
BERKELEY, Calif. -- BERKELEY, Calif. -- Mid-infrared light is immensely useful to biological studies because it offers a direct probe into the vibrational modes of the chemical bonds that hold atoms together. While intense sources of mid-IR radiation improve the...
System Detects ’Evil Twins’
FAYETTEVILLE, Ark. -- FAYETTEVILLE, Ark. -- In the pharmaceutical industry, many enantiomers, or mirror-image molecules, are harmless fillers, but some are truly evil twins that can cause birth defects or other health problems. Accordingly, the US Food and Drug...
Undercut Structure Boosts VCSEL Performance
May 1, 2001 — A double intracavity contacted structure developed at the University of California in Santa Barbara may lead to vertical-cavity surface-emitting lasers (VCSELs) that use lattice-matched distributed Bragg reflectors. Reporting in the March 5 issue of...
WaveSplitter Transmits 160 Channels
May 1, 2001 — WaveSplitter Technologies Inc. of Fremont, Calif., demonstrated a 160-channel dense wavelength division multiplexing module in March at OFC in Anaheim, Calif. The 25-GHz demultiplexing module transmitted C-band signals at a rate of 10 Gb/s, enabling...
Bow Ties May Make Good Sensors
TUCSON, Ariz. -- TUCSON, Ariz. -- In the future, bow ties may be more than a fashion accessory for political pundits and used-car salesmen. Researchers at the University of Arizona’s Optical Sciences Center have developed a 940-nm edge-emitting semiconductor...
Corals Wear Fluorescent Sunscreen
SYDNEY, Australia -- SYDNEY, Australia -- It may not be Coppertone, but it works. Scientists from the University of Sydney and the University of Copenhagen in Denmark have discovered that the fluorescent pigments in some corals protect them against sunlight and may help...
Evanescent Waves Probe Gas-Solid Interface
Apr 1, 2001 — A spectroscopic technique developed by a group from Odense Universitet in Denmark, Max Planck Institut für Strömungsforschung in Göttingen, Germany, and the Russian Academy of Sciences in Moscow enables the measurement of the...
Fast Ignition Proposed for Inertial Confinement Fusion
Apr 1, 2001 — Two groups have independently reported fast-ignition techniques for inertial confinement fusion, which drives the implosion of capsules of deuterium and tritium with laser or ion beams, either directly or with x-rays produced in a target hohlraum....
Fiber Probes Engine Oil
MADISON, Wis. -- MADISON, Wis. -- A new sensor that combines the signals from two probes may enable mechanical engineers to better characterize the distribution of motor oil in a running engine. Understanding the behavior of oil films could lead to engine designs...
Fuzzy Logic Boosts Laser Performance
Apr 1, 2001 — A team of researchers at Nanyang Technological University in Singapore has demonstrated that lasers controlled with fuzzy logic systems offer more stable output than optimized open-loop devices or those incorporating proportional integral derivative...
Infrared Camera Exposes Reef Building
MONACO -- MONACO -- Marine scientist John R.M. Chisholm was scratching his head over this one. The coral in his aquarium, it seemed, suffered from somnambulism. On 21 nights over the course of a month, the colonies moved across the sandy bottom to a rock as...
Is Space a Dispersive Medium?
Apr 1, 2001 — According to string theory, perhaps the top contender in the struggle to create a quantum theory of gravity, the vacuum of space is frothing. According to Dimitri V. Nanopoulos, a professor at Texas A&M University in College Station, and his...
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July 2024
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