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    • Volume 55, Issue 11

    More content from Volume 55, Issue 11

    FIGURE 1. Ultraviolet light sources span a series of wavelengths from 200 to 400 nm.
    With differences in spectral distribution, power level, and regulatory issues, UV LEDs challenge mercury arc lamps for disinfection, chromatography, and fluorescence imaging application...
    Nov. 19, 2019
    (Courtesy of II-VI)
    FIGURE 1. The 6 mm-mrad free-space rectangular BPP of the DirectProcess900 FlexShape laser engine by II-VI allows the laser to achieve spot sizes down to 0.2 mm.
    All the benefits of laser diodes apply to direct-diode systems: small size, long life, and high wall-plug efficiency.
    Nov. 19, 2019
    (Credit: S. R. Sandoghchi)
    Microscopic cross-section of the record-setting low-loss hollow-core fiber. Thin hollow glass cylinders shown in pink run the length of the fiber, effectively creating bars that prevent the hexagonal light modes trapped in the center of the air-filled core from leaking into the glass. The hollow core, defined by the inner edges of the cylinders, is 37 µm across.
    If loss can be made low enough, hollow-core optical fiber could begin to take over the uses of conventional solid-core fiber.
    Nov. 19, 2019
    These visualizations show the three different types of frequency components that the new ICZT algorithm, as well as existing CZT algorithms, can handle (Re is the real axis; IM is the imaginary axis). The image at left shows an exponentially decaying frequency component; at center, the special case of a temporally unchanging frequency component; and at right, an exponentially growing frequency component.
    The fast Fourier transform (FFT) and IFFT are key to many photonics-related algorithms; now, they are more useful than ever.
    Nov. 19, 2019
    The microscopy system captures multiple color images and converts them to a 16-bit high dynamic range grayscale image used for processing.
    A microscope-based imaging system features custom software for ensuring proper coating thickness.
    Nov. 19, 2019
    The Gravity Recovery and Climate Experiment (GRACE) Follow-On mission's laser-ranging interferometer (LRI) measures intersatellite distance with a noise level of 1 nm/(Hz)1/2 ...
    Nov. 19, 2019
    (Courtesy of Mehdi Azimipour, University of California, Davis)
    FIGURE 1. images simultaneously acquired from the AO-SLO-OCT system developed by Mehdi Azimipour and his colleagues at the UC Davis show how the higher spatial resolution of SLO distinguishes rods from cones; OCT then quantifies the individual photoreceptor response.
    Optical coherence tomography and adaptive optics have made enormous contributions to retinal imaging, and a recent development incorporates both methods, along with a scanning...
    Nov. 19, 2019
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    By using microfluidics to create liquid marbles and then assembling these marbles onto patterned substrates, arrays of convex or concave compound lenses can be created that mimic...
    Nov. 19, 2019
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    The Lasers & Photonics Marketplace Seminar will explore the impact of increasing economic uncertainty and changing markets on photonics businesses.
    Nov. 19, 2019
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    Photonics tools, especially hyperspectral imaging and spectroscopy, are aiding in agricultural production and protecting the food supply chain—more opportunity exists.
    Nov. 19, 2019
    National Institute of Information and Communications Technology
    NICT's experimental 1Pbit/s optical network testbed used three types of multicore fibers.
    The 1 Pbit/s switching demo uses spatial-division multiplexing, multicore optical fibers, and large-scale spatial optical switching.
    Oct. 18, 2019
    U of I
    Schematic of the split Hopkinson pressure-bar setup.
    Mechanical tests show how much current laser-based metal additive manufacturing techniques have improved over those from as recently as five years ago.
    Oct. 4, 2019