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Research & Technology News
UV Radiation Holds the Key to a New Film Curing Process
Mar 1, 1998 — Engineers at Research Frontiers Inc. in Woodbury, N.Y., have developed a faster process for making light-controllable film by curing it with ultraviolet radiation rather than heat. The process enables manufacturers to produce electrically controllable films whose light transmission can be varied rapidly by the user. These films feature the company's suspended particle device technology, providing control over the amount of light transmitted through windows, sun roofs, sun visors and eyewear.
Crystal Eases Blue Laser Production
Feb 1, 1998 — TROY, N.Y. -- Researchers at Rensselaer Polytechnic Institute have revived a bit of history in time for the first commercial blue-diode lasers. Companies hoping to manufacture blue lasers face several significant obstacles, including structural and...
Fiber Gratings Affect Noise of Semiconductor Lasers
Feb 1, 1998 — PASADENA, Calif. -- Researchers at the California Institute of Technology's department of applied physics have found a way to manipulate the noise intensity of a semiconductor laser using fiber Bragg gratings -- an advance that could lead to...
Fiber Optic Probes Improve UV Raman Spectroscopy
Feb 1, 1998 — Raman spectroscopy has emerged as an important tool in determining analytical and structural information concerning low concentration aqueous biomolecules. However, many samples require in vivo or in situ sampling. To solve this problem, scientists...
High-Power Lasers Send Electrons Flying
Feb 1, 1998 — PALAISEAU, France -- Scientists from four French and one British laboratories are using high-energy, short-pulse lasers to observe electron acceleration corresponding to an energy gain of 1.6 MeV in a plasma wave of less than 1 cm. Their technique...
Holography Accurately Measures Velocity
Feb 1, 1998 — WEST LAFAYETTE, Ind. -- Scientists at Purdue University have developed a convenient method for measuring the velocity of an object. It could prove particularly useful for remote sensing in manufacturing. Just as a strobe light makes a moving object...
IR Imaging Technology May Rival X-Ray
Feb 1, 1998 — Doctors have relied on x-ray technology for more than a century to diagnose a range of ailments, from broken bones to tumors. Though it is still an indispensable tool, many physicians remain leery of the potential damage the energetic beams can...
Laser Bursts Strengthen Metal Parts
Feb 1, 1998 — LIVERMORE, Calif. -- A new high-energy "laser peening" process can improve metal parts by sending a shock wave through the metal, inducing compressive stresses that reduce metal fatigue and boost resistance to corrosion. Manufacturers have been...
Laser Vision Aids Robotic Welders
Feb 1, 1998 — PARIS -- Shipbuilding plants have sought welders with top-notch skills for years. Now, thanks to photonics, a new breed of welder -- the robotic kind -- could rival humans in expertise and efficiency. The French Welding Institute developed RoboKid,...
Lasers Aid in Bacteria Destruction
Feb 1, 1998 — GLASGOW, Scotland, UK -- Heating bacteria to high temperatures will kill them, but exposing them to Nd:YAG laser light does it better, according to research findings at the University of Glasgow. Ian Watson, Duncan Stewart-Tull and co-workers at the...
Light and Sound Reveal Gas Leaks
Feb 1, 1998 — ANN ARBOR, Mich. -- Automakers are keeping an eye on a technique that uses laser light to detect gas leaks in engine and exhaust parts. Hermetic containers traveling down an assembly line have to be tested for leaks prior to shipping, or...
Mid-IR Lasers Offer Advantages
Feb 1, 1998 — Scientists from the Naval Research Laboratory in Washington and Hughes Research Laboratory in Malibu, Calif., reported that a vertical cavity surface-emitting laser (VCSEL) offers a number of advantages over single-mode edge-emitting lasers....
Moon's Measure Is Old Stuff
Feb 1, 1998 — AUSTIN, Texas -- When a reporter from the London Daily Telegraph and, later, another from the British Broadcasting Co. phoned Peter Shelus, an astronomer at the McDonald Observatory, to ask about his research, the scientist was somewhat baffled. The...
Optical Coating Absorbs in UV Range
Feb 1, 1998 — Reducing stray light is a problem that engineers often encounter when designing optical instruments. One method of achieving this reduction is to apply absorptive coatings on an instrument's critical components. Applications for the coating are...
Optics Test Could Affect Future Microchips
Feb 1, 1998 — A recent test of optical coatings at MIT may lead to increased interest in solid-state light sources for next-generation microchip lithography. MIT staff scientist Vladimir Liberman conducted the study to evaluate the state of excimer-grade fused...
Raman Spectroscopy Detects Herbicides in Water
Feb 1, 1998 — Raman Spectroscopy Detects Herbicides in Water ANN ARBOR, Mich. -- Researchers at the University of Michigan have employed Raman spectroscopy to measure two herbicides in water. The herbicides, paraquat and diquat, contain chemicals that cause plant...
Single-Mode Tunable Laser Backs up Optical Networks
Feb 1, 1998 — KISTA, Sweden -- Researchers have designed a semiconductor laser tunable in the erbium range that could replace more than 40 conventional fixed-wavelength lasers in dense wavelength division multiplex (WDM) systems. The new laser, a grating coupler...
Technique Lifts Shadows Surrounding Turbulence
Feb 1, 1998 — LOS ANGELES -- A new imaging technique could lead to a better understanding of nonlinear relationships and fiber optic communication by studying fluids. Physicist Steve Putterman at the University of California at Los Angeles and associates at the...
UV Spectroscopy Gauges Sea Salt
Feb 1, 1998 — PADOVA, Italy -- Ultraviolet absorption measurements provide a precise gauge of sea water salinity, an important gauge of ecological health, according to marine researchers here. Measuring sea salinity is important in assessing the movements of...
Diffuser Clarifies Cloud Studies
Jan 1, 1998 — LAMONT, Okla. -- Several design improvements including a reflective instead of transmissive light diffuser panel and fiber optic probe should help the US Department of Energy (DoE) better understand how radiation in the atmosphere affects weather...
Diode Laser Finds Home Aboard Columbia
Jan 1, 1998 — The video guidance sensor aboard the space shuttle Columbia featured eight fiber-coupled diode lasers as its essential components. The fiber-coupled lasers, manufactured by Opto Power Corp. of Tucson, Ariz., helped scientists from the Marshall Space...
For detectives who are hard-pressed to find clues at a crime scene…
Jan 1, 1998 — Sandia National Laboratories offers a solution. Researchers at the Albuquerque, N.M., laboratory are developing an evidence-detection system that illuminates the natural fluorescence of fingerprints, body fluids and other organic substances that may...
Future Looks Bright for Sol-Gel Techniques
Jan 1, 1998 — JENA, Germany -- Seven European partners have completed a three-year project to develop sol-gel processing techniques for waveguides, lens arrays, waveguide amplifiers, electro-optical modulators, switches and other elements. The goal was to develop...
Honey, I Shrunk the Lab
Jan 1, 1998 — PRINCETON, N.J. -- In a development reminiscent of Hollywood, chemists may soon find their extensive laboratory set-ups reduced to the size of a small laptop computer. Luckily, the chemists themselves can remain full size. Using microfabrication and...
Laser Could Extend Optical Lithography into VUV
Jan 1, 1998 — Lambda Physik of Göttingen, Germany, has developed a high-power, vacuum UV light source that may enable optical lithography to reach beyond the limits of the 193-nm ArF lasers now in use.
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