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  • Volume 37, Issue 4
  • Volume 37, Issue 4

    More content from Volume 37, Issue 4

    Researchers at the Georgia Institute of Technology (Georgia Tech; Atlanta, GA) have taken a process similar to photography down to a submicron scale and come up with a potential...
    April 1, 2001
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    Although polarization-maintaining (PM) passive fiber is widely available, it can be difficult to find the PM rare-earth-doped double-clad fiber often demanded by higher-power ...
    April 1, 2001
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    Because femtosecond light pulses affect matter in ways longer pulses cannot, ultrafast lasers have become important for research, and have great potential for industrial use as...
    April 1, 2001
    Differences between the images used as input to the phase-diversity system's algorithm for defocus (a), astigmatism (b), coma (c), trefoil (d), and spherical aberration (e) and the phase-diversity images corresponding to different aberration types that were captured with the phase-diversity sensor.
    A research team at the Defence Evaluation and Research Agency (Worcestershire, England) has developed a simple sensor for generating test wavefronts that combines a distorted ...
    April 1, 2001
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    A recent investigation at the US Air Force Institute of Technology (AFIT; Wright-Patterson AFB, OH) and the Air Force Research Laboratory (Kirtland AFB, NM) has shown that it ...
    April 1, 2001
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    Science may have finally caught up with science fiction. Harvard physicist Lene Vestergaard Hau and her group at the Rowland Institute for Science (Cambridge, MA) have for the...
    April 1, 2001
    Last image taken by the spacecraft as it landed reveals a unique feature never before seen. The streaky lines at the bottom, taken at a range of 120 m, indicate loss of signal as the spacecraft touched down on the asteroid during transmission. Just to the left of center at the bottom of the image is an apparent collapse feature the size of one's hand, formed when support is removed from beneath the surface.
    After one of the softest planetary landings in history, ground controllers extended the mission of the Near Earth Asteroid Rendezvous (NEAR) to allow the NEAR Shoemaker spacecraft...
    April 1, 2001
    Infrared products will experience strong and steady growth over the next five years, according to The Market for Infrared Thermometers and Thermal Imagers Worldwide, a market ...
    April 1, 2001
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    The lack of inexpensive commercial narrowband picosecond light sources meant a custom source was required for trace gas analysis.
    April 1, 2001
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    Wavelength-tunable semiconductor lasers are on their way to becoming an essential part of wavelength-division-multiplexed (WDM) all-optical networks.
    April 1, 2001
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    Short-pass optical filters (filters that transmit short and reject long wavelengths) are an important part of many imaging systems. They can be used by themselves or in combination...
    April 1, 2001
    Photobit completes $25-million finance round; Roper Scientific and Redlake Imaging consolidate; NEC spins off new semiconductor company
    April 1, 2001
    Rofin-Sinar subsidiaries take on partners; Cree expects 10% to 15% dip in revenues; Cymer revenues to go down about 10%...
    April 1, 2001
    QC laser becomes free-space communications link; Laser prints active indium-oxide optical microstructures; Extra layers make ZnTe quantum-well structure lase in green...
    April 1, 2001
    Extraction Systems forms new optics-protection R&D group; Wescam acquires optics supplier; Gemfire receives new funding...
    April 1, 2001
    With data transfer increasingly becoming a bottleneck in data processing, optical interconnects are demanding more speed from receivers—and are getting it.
    April 1, 2001
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    The rapidly increasing complexity of optical networks requires efficient wavelength conversion. Several technologies are under development, as the search for the ideal wavelength...
    April 1, 2001
    FIGURE 1. High-brightness 'allengap' LED demonstrates new LED geometries that are aimed at extracting more light by reducing internal reflections.
    This article is the first in a new 12-month Back to Basics series in which contributing editor Stephen Matthews will discuss the fundamentals of lasers and sources.
    April 1, 2001
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    An understanding of vacuum technology and appropriate system maintenance are essential for achieving repeatable vacuums consistently.
    April 1, 2001
    The study of mechanical stresses on the human body assists in the design of useful medical solutions. Speckle interferometry is one method that gives engineers something to work...
    April 1, 2001
    1304qa Chang New
    I am entering the job market with an MS engineering degree. What career path would best prepare me for entrepreneurship?
    April 1, 2001
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    Power module from Analog Modules, Longwood, FL; Electro-optic modulators from LINOS Photonics, Milford, MA; Galvanometer from Nutfield Technology, Windham, NH; Film deposition...
    April 1, 2001
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    The market for conventional light-emitting diodes (LEDs) has not grown significantly during the past five years, while the market for high-brightness LEDs grew 53% last year alone...
    April 1, 2001
    I want to clarify a few points mentioned in your February article on Software and Computing ("Personal computer technology simplifies beam profiling," Laser Focus World, February...
    April 1, 2001
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    A group at the Electrotechnical Laboratory (ETL; a part of the National Institute of Advanced Industrial Science and Technology) has developed a high-sensitivity single-photon...
    April 1, 2001
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    People often forget that stress is not just a human condition. When subjected to some change in the environment, even plants will react physiologically or biochemically.
    April 1, 2001
    A listing of industry meetings, courses, and calls for papers.
    April 1, 2001
    InGaAs PIN photodiodes from Hamamatsu, Bridgewater, NJ; Water to ambient air-cooling system from Thermatron Engineering, Methuen, MA; Glass ferrules from Wilmad-Labglass, Buena...
    April 1, 2001
    Led by the auto industry and followed closely by telecommunications firms, US industry has announced layoffs at an unusually high rate this winter, which some say indicates a ...
    April 1, 2001
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    Researchers at Darmstadt University of Technology (DUT), Germany, have demonstrated the use of photorefractive (2+1)D-solitons as a means of providing rewritable waveguides.
    April 1, 2001
    President George W. Bush released his budget proposal last month and it contained both good news and bad news for the laser industry and other high-technology concerns. The good...
    April 1, 2001
    FIGURE 1. False color intensity pattern resulted from taking the output of a single-mode fiber (SMF-28), collimating it through a SELFOC lens, propagating it 25 mm to a MEMS mirror that is 100-µm square and tilted about 40 degrees to the beam, propagating the reflected beam another 25 mm to a focusing SELFOC lens and focusing the beam onto another SMF-28 fiber. Note that the square aperture of the mirror has resulted in significant clipping of the beam and significant diffraction effects at the focused spot, which no longer resembles a Gaussian.
    For many conventional optical systems, such as a typical camera lens, ray tracing based on the geometrical concepts of Snell's law provides an excellent simulation method for ...
    April 1, 2001
    It's good to know that even the high priests of the computing community, such as MIT's Michael Dertouzos, are outraged by the appalling habits of today's personal computers.
    April 1, 2001
    Futuristic design of the Koleos automobile is enabled in part by the use of fluid optics technology for illumination.
    The French automobile manufacturer Renault has used an innovative optical system in its new concept car, the Koleos. First shown at the automobile exhibition in Geneva last year...
    April 1, 2001
    A look at the content of this month's issue brings to mind the long-running television science-fiction series Star Trek. Essential to the ongoing survival of the star ships is...
    April 1, 2001
    JDSU lays off workers, but still grows; Corning cuts jobs while opening new plants; EXFO acquires expertise in EFOS and Vanguard...
    April 1, 2001
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    TOKYO—Sony Corp. has developed a holographic printing technology that can quickly put several hundred frames of moving image data into one photograph.
    April 1, 2001
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    Optical network systems based on wavelength-division multiplexing (WDM) require photoreceivers that can efficiently convert optical signals into electrical signals.
    April 1, 2001
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    Although optical techniques have played a key role in surface-roughness testing for almost a decade, the systems are often complex, bulky, and difficult to align. As a result,...
    April 1, 2001
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    It has become common to see spinoffs from the space program finding their way into commercial applications, but at January's Photonics West conference (San Jose, CA) researchers...
    April 1, 2001