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Research & Technology News

Diamond Enables Higher Laser Powers
LONDON -- LONDON -- Diamonds are a CO2 laser’s best friend. As industrial laser applications require higher powers and better beam quality, manufacturers must look beyond zinc selenide to synthetic diamond. With the increased need for higher beam quality and output powers in industrial applications, laser manufacturers will turn to windows constructed of synthetic diamond. At issue are the material properties of the substances, said Ricardo S. Sussmann, the former head of research...
Disorderly Crystals Produce Laser Light
EVANSTON, Ill. -- EVANSTON, Ill. -- Lasers are models of meticulous manufacturing processes and precision alignment. An agglomeration of randomly ordered nanocrystals is about as far from precision manufacturing as can be imagined, but researchers have observed...
In Space, No One Can Hear You
HUNTSVILLE, Ala. -- HUNTSVILLE, Ala. -- Space is a mess. Thousands of satellites race above us, as do thousands of bits of junk. With the International Space Station up and running for at least the next 20 years, the threat of a catastrophic collision with space debris...
Laser Tracks Movement of Bacteria
BALTIMORE -- BALTIMORE -- A laser-tracking device has allowed researchers to follow bacterial movement with near-atomic resolution, which has led to a better understanding of how bacteria spread among cells. Researchers at Johns Hopkins University created a...
Low-Cost, High-Brightness LEDs Developed
Jan 1, 2001 — Researchers at OSA GmbH of Berlin have developed LEDs that are up to five times brighter than conventional devices and that will cost half as much as other high-brightness LEDs. The company, a subsidiary of SLI Inc. of Canton, Mass., expects to...
New Liquid Crystal Promises Better Displays
EINDHOVEN, Netherlands -- EINDHOVEN, Netherlands -- Researchers at the Dutch Polymer Institute of Eindhoven University of Technology have identified materials that may enable them to develop liquid crystal displays (LCDs) that generate contrast by controlling...
Novel Fiber Used in Amplifiers
Jan 1, 2001 — Light amplifiers produced with a semiconductor-film-clad cylinder fiber developed at Syracuse University in Syracuse, N.Y., and Dove Photonics of Rome, N.Y., (see Photonics Spectra, October 1999, p. 47) threaten to challenge erbium-doped fiber...
Optical Comb Offers Laser Reference
BOULDER, Colo. -- BOULDER, Colo. -- The gold standard of time or frequency measurements at the heart of most atomic clocks is the microwave transition in cesium atoms. Now researchers have coupled the stable frequency reference of a cesium microwave clock to a...
Optical Patterning Structures Films
ALBUQUERQUE, N.M. -- ALBUQUERQUE, N.M. -- Researchers at Sandia National Laboratories have developed an inexpensive method for controlling the structure of thin films. Using self-assembly methods and optical patterning, they create ordered porous composite...
Quantum Dots Suitable for Computing
SANTA BARBARA, Calif. -- SANTA BARBARA, Calif. -- A new study has found that quantum dots not only behave according to the predictions of quantum physics, but do so at room temperature. The discovery, which proves that the emission of quantum dots is binary in nature,...
Reaction Dynamics Control Molecular Imprints
TORONTO -- TORONTO -- John C. Polanyi, professor of chemistry at the University of Toronto, has studied chemical reactions for years, sharing the 1986 Nobel Prize in chemistry for his insights into this field of reaction dynamics. Today he is investigating the...
Six-Band Sensor Put Through Its Paces
Jan 1, 2001 — The Japan Defense Agency in Tokyo has completed a study of a multispectral sensor for airborne surveillance. The sensor, which the team described in the October 2000 issue of Optical Engineering, features off-axis three-mirror reflective optics....
Thermal Lasers May Upset Offset Printing
BEDFORD, Mass. -- BEDFORD, Mass. -- A printing press is the single largest capital investment of a newspaper or a printing house, and press time is precious. The owner loses money every minute that the press is down, such as when the aluminum printing plates are...
Tunable IR Quantum Cascade Laser Demonstrated
Jan 1, 2001 — A team at the Technical University of Vienna in Austria announced that it has constructed tunable distributed-feedback quantum cascade lasers with a peak emission at 9.35 µm. The surface-emitting devices may find applications in chemical...
Welding Suited to Shipbuilding
Jan 1, 2001 — Current welding methods distort the structural steel plates used for shipbuilding, requiring manufacturers to invest time and money in postprocessing. The shipbuilding industry would like to take advantage of the speed and economy of laser welding,...
Alcatel Breaks 5-Tb/s Transmission
Dec 1, 2000 — Alcatel of Paris has demonstrated 5.12-Tb/s transmission over 300 km of its TeraLight optical fiber. Such a transmission capacity would enable more than 100 million voice calls or 640,000 high-speed Internet connections to be carried over a single...
Camera’s Exposures Always Correct
NEW YORK -- NEW YORK -- The human eyeball can handle an enormous range of brightness levels. It can look at a darkly tanned person sitting on the brilliant white sand of a beach in glaring midday sunlight and correctly distinguish that person’s features,...
Dielectric Waveguide Betters Fiber
CAMBRIDGE, Mass. -- CAMBRIDGE, Mass. -- Building on its wide-bandwidth, wide-angle, high-reflectivity dielectric mirror, a research team at Massachusetts Institute of Technology has designed a dielectric waveguide with several advantages over optical fiber. It will be...
Dispersion Increases Fiber Capacity
HOLMDEL, N.J. -- HOLMDEL, N.J. -- A researcher at Lucent Technologies Inc.’s Bell Labs has taken a working solution to a wireless communications problem and applied it to optical communication over multimode fiber. Although still in the early stages of...
Excimer Laser Processes Ceramic Spinnerettes
MÜNSTER, Germany -- MÜNSTER, Germany -- A new procedure that employs an excimer laser emitting at 248 nm shows promise for the fabrication of ceramic spinnerettes. Spinnerettes are small nozzles typically made of a metal alloy that are used in the production of...
Fiber Probe Enhances Plasma Spectroscopy
MUNICH, Germany -- MUNICH, Germany -- Monitoring the exhaust plumes from industrial activities such as power generation may soon be faster and more accurate. Researchers at Munich Technical University are testing a rugged fiber optic probe that can be placed inside an...
Flexible Laser Produced
MUNICH, Germany -- MUNICH, Germany -- Scientists from Ludwig Maximilians Universi-tät, the Fraunhofer Institut für Solare Energiesysteme in Freiburg and the Max Planck Institut für Polymerforschung in Mainz, all in Germany, have developed a laser design...
High-Speed Video Exposes Snapping Shrimp
Dec 1, 2000 — Scientists from the University of Twente in Enschede, the Netherlands, and their colleagues in Germany have solved the mystery of how snapping shrimp make their distinctive noises. Biologists had theorized that the crustaceans produce the 210-dB...
Holography Monitors Microscopic Marine Life
ABERDEEN, UK -- ABERDEEN, UK -- Scientists estimate that 80 percent of the oxygen in the atmosphere is produced by phytoplankton, ocean-dwelling one-celled photosynthesizing organisms. It seems understandable, therefore, that we would want to investigate the...
Laser Destroys Multiple Rockets
Dec 1, 2000 — TRW Inc.’s Space & Electronics Group of Redondo Beach, Calif., has reported that the Tacti-cal High Energy Laser/ Advanced Concept Technology Demonstrator successfully completed a series of salvo tests at White Sands Missile Range in New...

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