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(38,322 articles)
Popular News
Shaping Diamond for Industrial Tools
Jul 1, 2003 — Both manufactured (polycrystalline) and natural diamonds are finding an ever-increasing variety of industrial uses in such applications as drawing wire, extruding fibers, cutting hard-to-machine materials and producing precision surgical instruments. Shaping the raw diamond material into usable tools has not been easy, though, because of its natural hardness. The main processes used to machine diamond-based materials into their final shapes are electro-discharge machining and lasers. The...
Lasers Trim Embedded Passive Components
Jul 1, 2003 — Throughout the electronics industry, the demand for more functionality and reduced package size continues unabated. This, in turn, requires integrated circuits and printed circuit boards with higher density, improved performance and more flexible...
Microscopy Solutions Accelerate Research
Jul 1, 2003 — Plug-and-play microscopy is a fairly new concept that has some researchers shaking their heads. Microscopes are complex pieces of equipment, and getting the best image of the sample is anything but easy. Help is at hand, however, thanks to recent...
Imaging Center Offers the Latest Microscopy Techniques
Jul 1, 2003 — Scientists study samples, such as microscopic detail of cellular tissue from a mouse kidney and live yeast cells, for obvious reasons. By examining these, they can begin to understand the inner workings of cellular systems, which could lead to the...
New Tools Add Precision to Live-Cell Fluorescence
Jul 1, 2003 — Researchers using live-cell fluorescence often have to examine samples repeatedly to observe changes over time. Viewing multiple samples in three dimensions as a time-lapse movie is common in labs such as the Nikon Imaging Center at Harvard Medical...
Focusing on TIRF Microscopy
Jul 1, 2003 — Applications from cell dynamics and single-molecule events to vesicle and protein tracking are all within the realm of total internal reflection fluorescence (TIRF). The technique is so named because it involves total internal reflection of the...
Automation Adds to the Microscopy Mix
Jul 1, 2003 — Some researchers are legendary for their lab capability, easily able to find needles in haystacks. Others who complain that they were never good in the lab appreciate simple-to-operate equipment. Although the concept of point-and-shoot microscopy...
Adaptive Optics Improves Multiphoton Imaging
Jul 1, 2003 — In the years since Bio-Rad Laboratories Ltd. of Hemel Hempstead, UK, licensed the right to commercialize multiphoton microscopy systems from Cornell University in Ithaca, N.Y., turnkey multiphoton workstations have appeared in labs worldwide....
Piezoresistive Sensors Facilitate High-Speed Nanopositioning
Jul 1, 2003 — Science and industry requirements are fueling demand for smaller and higher-speed nanopositioners. Capacitance sensors, which are used in many nanopositioners, may pose problems when used with either miniaturized or faster nanopositioning systems,...
Thin-Film Filters Come of Age
Jul 1, 2003 — Multilayer optical thin-film filters play a critical role in applications ranging from biomedical and analytical instrumentation to advanced laser systems. Although many of these applications still rely on outdated filter technology, there is light...
Compensating Thermal Effects in Rod Lasers
Jul 1, 2003 — By forcing an Nd:YAG laser to operate in radial or azimuthal polarization, a team at Soreq Nuclear Research Center in Yavne, Israel, has overcome the thermally induced beam-quality aberrations commonly associated with solid-state rod lasers. The...
Novel Chromatic Dispersion Compensation
Jul 1, 2003 — A collaboration between researchers at OFS and Bell labs of Murray Hill and Holmdel, N.J., respectively, has produced a novel system for tunable fiber optic dispersion compensation that is effective with any wavelength division multiplexing (WDM)...
Eliminating Beat Noise in Ring Lasers
Jul 1, 2003 — Single-frequency ring lasers utilizing erbium-doped fiber amplifiers as the gain medium are attractive in a number of applications, from optical sensors to telecommunications. A serious barrier to their adoption into these technologies, however, is...
Digital Holography Used in Watermarking 3-D Object
Jul 1, 2003 — In this age of tightened security, researchers at the University of Connecticut in Storrs have discovered what may someday prove to be a useful method of hiding one piece of information inside another. Using a watermarking method, a 3-D object is...
Shocked Photonic Crystals Tune Light
Jul 1, 2003 — In a series of "numerical experiments," researchers at Massachusetts Institute of Technology in Cambridge have discovered novel frequency-shifting and bandwidth-narrowing phenomena that occur when light interacts with a shock wave in a photonic...
Scanning Systems Help Lasers Make Their Mark
Jul 1, 2003 — Think of industrial lasers, and you probably envision showers of sparks on robotic assembly lines as automobiles are welded, or on job-shop floors as sheets of steel are cut through like butter. No doubt, welding and cutting are among the...
Polymer Lasers Produced by Soft Lithography
Jul 1, 2003 — Scientists at the University of St. Andrews in the UK have fabricated semiconducting polymer distributed feedback lasers in less than two minutes using solvent-assisted microcontact molding. The researchers' work, which was published in the June 9...
All-Optical Device Switches Signal Wavelength
Jul 1, 2003 — Researchers at the University of California, Santa Barbara, have developed what they call a "tunable photon copier," an integrated device that receives an input signal at one wavelength and converts it to another. The 0.5 x 3-mm indium phosphide...
National Ignition Facility Beamline Produces 10.4 kJ
Jul 1, 2003 — On the evening of May 30, researchers at the National Ignition Facility at Lawrence Livermore National Laboratory in Livermore, Calif., achieved another milestone in laser science, obtaining a record 10.4-kJ pulse of 351-nm radiation from one...
Photonics Examines Brake Noise
Jul 1, 2003 — Most automotive brake noise is little more than an annoyance. But as advances in technology and design have made vehicles quieter, customers have a lower tolerance for these squeals, groans and moans, and the automotive industry is pressed all the...
Spectrometer Uses Micromachined Grating
Jul 1, 2003 — In the pursuit of compact spectrometers for a variety of industrial applications, researchers at Fraunhofer Institut für Photonische Mikrosysteme in Dresden, Germany, have developed a device based on a micromechanical scanning grating. They suggest...
Fiber Laser Pumps Fiber Lasers for Telecommunications Applications
Jul 1, 2003 — A coalition of British and Russian telecom engineers has developed a fiber laser system that may boost performance and cut costs when substituted for the traditional diode laser transmitters in wavelength division multiplexing (WDM) networks. The...
Nd:BaYF Laser Produces 2.4 W
Jul 1, 2003 — Lasers based on BaY2F8 (BaYF) have the potential to compete with other neodymium-doped solid-state devices for moderate-power, near-IR applications, a team of scientists in Italy has reported. In recent experiments, the group, which included members...
Microscopy Probes Electron Behavior in Lasers
Jul 1, 2003 — Using variants of atomic force microscopy, a group of scientists from the University of Toronto and from Nortel Networks Optical Components in Ottawa has directly investigated the electronic characteristics of a semiconductor laser in operation. The...
Systems Compensate for Polarization Mode Dispersion
Jul 1, 2003 — Dispersion, particularly polarization mode dispersion, becomes increasingly problematic at higher fiber optic data rates because the resulting signal distortion scales as the square of the data rate. Although there are several techniques to...
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August 2024
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