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(38,345 articles)
Popular News
Grating Is Written Directly into Ytterbium-Doped Silica Fiber
Aug 1, 2007 — Fiber Bragg gratings (FBGs) are frequently used as the reflectors on fiber-laser resonators. These gratings are written in photosensitive fibers that are fused onto the doped-silica fiber that provides the laser gain. Making the fusion joints entails an extra step in fabricating the laser, introduces an additional intracavity loss mechanism and diminishes the laser’s overall robustness. Recently, scientists in Australia wrote an FBG directly into an ytterbium-doped silica fiber, resulting in a...
New Saturable Absorber Material Q-Switches Vanadate Laser
Aug 1, 2007 — Passive Q-switching has found broad acceptance with diode-pumped solid-state lasers because saturable-absorber Q-switches are rugged and simple to operate, resulting in compact and robust lasers. But there are trade-offs among the different...
Cylindrical Polarization: the Path to High Power
Aug 1, 2007 — Scientists at the Soreq Nuclear Research Center in Yavne, Israel, have previously demonstrated that cylindrically polarized light can be amplified in solid-state rod amplifiers with higher efficiency than can linearly polarized light. When linearly...
Short Q-Switched Fiber Laser Generates Millijoules in Nanoseconds
Aug 1, 2007 — Fiber lasers have displaced conventional solid-state lasers in many continuous-wave industrial applications such as welding and cutting. But other applications such as marking, scribing and trimming as well as precision machining require energetic...
Building a Telescope to Supplant Hubble
Aug 1, 2007 — In 2013, the James Webb Space Telescope is scheduled for launch. Three months later, it will settle into a spot about 1 million miles from Earth, from which it will record light from nearly the beginning of time and from the edge of space. By...
Electron-Multiplying CCD Camera in X-ray Imaging
Aug 1, 2007 — With the onset of improved, patient-specific treatments for vascular disease, along with advancing diagnostic techniques, there is an increasing need for high-resolution images obtainable in real time. Current state-of-the-art medical x-ray image...
Ink-Jet Technique Yields Microlenses of Various Focal Lengths
Aug 1, 2007 — Microlenses, which are used for technologies such as CCD cameras and laser beam collimators, can be difficult and, thus, expensive to produce. Some researchers have applied ink-jetting methods to deposit polymer solutions and UV-curable adhesives to...
Organic Solar Cell Achieves Higher Efficiency
Aug 1, 2007 — Organic solar cells that convert 6.5 percent of incoming light into usable power have been created with a design approach that incorporates two multilayered parts that act together to boost output. Although organic solar cells have been around...
Liquid Lenses Take Various Forms
Aug 1, 2007 — Having the potential to allow compact adaptive optical features in many settings, liquid lenses have captured the interest of numerous researchers. In two published studies, scientists describe an adaptive lens that could be used for mobile phones...
Imaging a Spinning Star
Aug 1, 2007 — To borrow from an old saying, four telescopes are better than one. Thanks to long-baseline optical interferometry, using a quartet of the devices provides 100 times better performance when it comes to resolving distant objects. Astronomers...
Lunar Telescope to Have Liquid Mirror
Aug 1, 2007 — Thanks to out-of-this-world thinking and down-to-earth materials research, scientists — from Université Laval in Quebec City, from the University of Arizona in Tucson, from the University of British Columbia in Vancouver, Canada, and from Queen’s...
Measuring and Improving Mixing Times with Image Analysis
Aug 1, 2007 — Industrial engineers and others often characterize the performance of agitating impellers using total mixing time — the amount of time that it takes for a solution to reach a degree of homogeneity after a change, such as that caused by stirring....
Optical Techniques Gauge Champagne Bubble Stability
Aug 1, 2007 — The hallmark of a good glass of champagne is a stable ring of bubbles — called a collar — at the top of the glass. The formation and disappearance of these bubbles are delicate phenomena that are sought after by champagne makers, but they are not...
Studying Engines in Action
Aug 1, 2007 — Although it was enough for a famous “little engine” to think it could, more than wishful thinking is needed to move things along in the real world. Motors produce movement by using an energy source, which for internal combustion engines is a...
Program Identifies Four Technology Areas of National Interest
Aug 1, 2007 — The Advanced Technology Program (ATP) of the US Commerce Department is managed by the National Institute of Standards and Technology (NIST) which, since 1990, has held competitions for funding of high-risk industrial research and development...
SPIE Changes Name
Aug 1, 2007 — SPIE has retired The International Society for Optical Engineering as its official business name and will now be known simply as SPIE. The change was made to better represent the growing number of scientists, researchers and engineers in industry,...
Carl Zeiss to Supply Tools for Photomask Metrology
Aug 1, 2007 — A team of manufacturers led by Sematech of Austin, Texas, has selected Carl Zeiss SMT AG of Oberkochen, Germany, to supply advanced tools for photomask pattern placement metrology. The technology is considered critical in the implementation of...
Demand Prompts Expansion of TMC
Aug 1, 2007 — Technical Manufacturing Corp. of Peabody, Mass., has expanded for the fourth time in 15 years in response to customer demand for its precision floor vibration isolation systems. The 9000-sq-ft addition houses assembly, cleaning and packaging areas...
Trumpf Opens Office in South Korea
Aug 1, 2007 — Trumpf GmbH + Co. KG of Ditzingen, Germany, has established offices in Seoul for its Trumpf Korea subsidiary. Occupying four of the 12 stories of the Trutec building, the offices house a sales and service staff, a showroom and a training center. The...
Trumpf and Jenoptik Establish Joint Venture
Aug 1, 2007 — Trumpf GmbH + Co. KG of Ditzingen and Jenoptik AG of Jena, both in Germany, have announced their intent to set up a joint venture. The company, JT Optical Engine GmbH + Co. KG, will be headquartered in Jena and will develop, manufacture and market...
Companies Sign Definitive Merger Agreement
Aug 1, 2007 — In California, Oplink Communications Inc. of Fremont will acquire Optical Communication Products Inc. of Woodland Hills, a designer and producer of fiber optic components for local area and other networks. Under the terms of the agreement, the...
Heptagon Creates Base in Singapore
Aug 1, 2007 — A supplier of wafer-scale micro-optics, Heptagon Oy of Espoo, Finland, has opened a 20,000-sq-ft manufacturing plant and regional headquarters in Singapore. The facility is part of the wholly owned subsidiary Heptagon Micro Optics (Singapore) Pte...
Nexxus Lighting Plans LightWild Acquisition
Aug 1, 2007 — Nexxus Lighting Inc. of Charlotte, N.C., has signed a nonbinding letter of intent to acquire LightWild of Overland Park, Kan., a manufacturer of software-controlled solid-state LED products for the architectural lighting market. These products...
Optical Society of America Bestows 17 Awards
Aug 1, 2007 — The Washington-based Optical Society of America (OSA) has announced the names of the 17 scientists and engineers who will receive the society’s prestigious awards. The nominees have made a significant contribution to the field of optics and...
New Imaging Company Launched in the UK
Aug 1, 2007 — Mark J. Riches has launched Invisible Vision Ltd., an imaging company in Norwich, UK. The company sells UVi camera intensifiers, add-ons to high-speed cameras that are designed to add low light and extended spectral range and to provide fast gating...
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