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  • Volume 50, Issue 07

    • Volume 50, Issue 07

    Industry Forum Baker Photo Web
    Milton Chang
    July 8, 2014
    This is the third in a series of interviews with leaders of our professional societies to give us a better understanding of the ecosystem of our industry.
    FIGURE 1. In the extrusion process, a glass billet (a) is melted and forced through an extrusion die (b) to create (c) a glass preform (d) representative of the die shape. The preform is then overclad with a glass tube and drawn (e) into smaller fibers such as this suspended-core fiber (f) design shown by a scanning-electron microscope image.
    July 8, 2014
    If the holes in microstructured fibers are filled with extremely bright rare-earth-doped nanocrystals (Superdots), the tailored-fiber geometry and bright particles significantly...
    FIGURE 1. Rayleigh scattering of light from molecules in the air scales inversely with the fourth power of the wavelength.
    July 8, 2014
    The beam focus of high-power fiber lasers can be characterized via imaging of Rayleigh scattering in air-an indirect detection method that avoids damage to detectors due to ultrahigh...
    1407lfw 50
    July 8, 2014
    Laser scanning confocal microscopy can be used to precisely measure the topographies of stainless-steel surfaces machined by micro-electric discharge machining to scales of 200...
    FIGURE 1. Unless energy efficiency is improved, the estimated total electrical consumption of all of the world's existing UV argon fluoride (ArF) dry and ArF immersion lithography laser systems could almost double in the next 10 years.
    July 8, 2014
    Ultraviolet lithography lasers with injection-lock technology use 50% less electricity and gas, enabling technically and ecologically viable 450 mm semiconductor wafer manufacturing...

    More content from Volume 50, Issue 07

    Courtesy of Synopsys
    FIGURE 1. A cell-phone lens was optimized in CODE V without any control of tolerance sensitivity (a); a similar cell-phone lens was globally optimized in CODE V including the tolerance-sensitivity error function, resulting in a 24% improvement in RMS wavefront error (b). The cumulative probability charts show the probability of achieving the indicated RMS wavefront error performance for systems built within a set of specified tolerances using designated compensators. As the curves move farther to the left, better as-built performance is achieved.
    John Wallace
    July 8, 2014
    Optical-design programs encompass lens and illuminator design, analysis, and tolerancing, as well as photometrically tailored design and the interface with external computer-aided...
    (Courtesy: Boeing)
    FIGURE 1. The U.S. Army's high-energy-laser mobile demonstrator (HEL-MD) shot down targets with a 10 kW fiber laser in tests at White Sands and Eglin AFB in Florida. Boeing supplied the acquisition, tracking, and beam-delivery optics that fire a beam through the portal on top of the Army's heavy expanded mobility tactical truck (HEMTT). Boeing will install a 60 kW laser for further tests.
    Jeff Hecht
    July 8, 2014
    Solid-state lasers have reached the 100 kW class, and demonstrated that they can shoot down militarily important targets. The next challenge is to harden laser systems enough ...
    FIGURE 1. A conceptual image shows the laser-inscription process; nonlinear absorption occurs at the laser focus, resulting in white-light emission and highly localized energy deposition. A laser can effectively draw a waveguide in a bulk-glass material.
    July 8, 2014
    Integrated photonics can be written in glass via nonlinear absorption by focusing a short-pulse-duration laser into the glass; quantum-integrated-photonics (QIP) devices are being...
    Conard Holton2
    Conard Holton
    July 8, 2014
    In a recent blog posted on www.laserfocusworld.com, Strategies Unlimited analyst Allen Nogee noted that 2014 total laser sales are looking up, and some of the laggard areas are...
    A VECSEL chip and its V-shaped cavity sit inside a sturdy plastic box; a beamsplitter and wavelength measurement instrumentation are placed outside the box. A birefringent filter (BRF) in the cavity produces single-frequency laser output. The high-reflection (HR) cavity mirror has a 600 mm radius of curvature (Rc).
    John Wallace
    July 8, 2014
    Researchers in Germany have developed a single-frequency, single-transverse-mode VECSEL that has a continuous-wave (CW) output of 23.6 W at 1013 nm.
    A schematic comparison describes an OLED a) without any ILE scheme showing TIR and Fresnel reflection and b) with ILE using nanocrystalline scatterers and a high-index smoothing layer that scatters indiscriminately at all incident angles. The blue rays represent the light that travels within the escape cone, with the thin blue rays representing light reflected due to Fresnel reflection and the red rays representing the light that travels outside the device.
    Gail Overton
    July 8, 2014
    Recognizing the opportunity for significant improvements in OLED output, Pixelligent has developed PixClear, a nanocrystalline synthesis and surface-modification technology that...
    (Credit: Optics Letters)
    A Fresnel lens, 1 mm thick and with a diameter of a little less than 4 mm, is shown next to a Euro cent for comparison (inset); the lens allows images such as this one to be taken at IR wavelengths normally inaccessible to Si lenses.
    John Wallace
    July 7, 2014
    A group of French researchers has designed and fabricated a type of small, thin silicon (Si) Fresnel lens that can simplify compact thermal infrared (IR) cameras and make them...
    Courtesy of Sigma Space Corporation
    A de-noised 3D point cloud data off of Point Lobo near Monterey, CA, obtained by HRQLS (top) is shown from an altitude of 2.3 km at a velocity of 200 knots. A 2D profile (bottom) of a 30 m strip from the top figure spans the ground from a local monastery (right) into the Pacific Ocean (left), demonstrating the ability of HRQLS to obtain coastal-bottom returns to depths of 13.5 m.
    Gail Overton
    July 7, 2014
    The primary technical goal of Sigma’s recently introduced, self-funded, moderate-altitude high-resolution quantum lidar system (HRQLS; pronounced Hercules) is to allow large areas...
    Content Dam Lfw Print Articles 2014 07 1407lfwnbf3web
    July 7, 2014
    Physicists from the Eberhard Karls Universität Tübingen in Germany have fabricated subwavelength gold nanocones that serve as nonlinear optical devices.
    Content Dam Lfw Print Articles 2014 07 Nb Osram Multilaser Web
    July 3, 2014
    In the interests of boosting the power of blue-emitting laser sources for projection while at the same time reducing their complexity, Osram Opto Semiconductors has unveiled a...
    Content Dam Lfw Print Articles 2014 07 1407lfwnbf1web
    July 2, 2014
    Rather than trying to create a grating coupler based on a certain principle, researchers at Technische Universität Berlin and IHP GmbH are using two “metaheuristic” search methods...
    Content Dam Lfw Print Articles 2014 07 1407lfwnbf2web
    July 2, 2014
    A new tunable design from the Wireless Optoelectronic Research & Innovation Centre (WORIC) at the University of South Wales uses an etalon-based design that enables the tuning...
    Content Dam Lfw Print Articles 2014 07 Nb Fibrance
    July 2, 2014
    Fibrance is the term coined by Corning Incorporated for its new optical fibers that distribute a variety of wavelengths of light evenly along their length, much like very tiny...