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    • Volume 57, Issue 01

    More content from Volume 57, Issue 01

    FIGURE 1. Laser beam uniformity affects lapping in the cladding process.
    A low near-field nonlinearity (low-SMILE), 32-bar diode stack produces a 6 kW uniform flat-top beam for cladding applications.
    Jan. 27, 2021
    (Courtesy of the International Committee on Ultrahigh Intensity Lasers; icuil.org)
    FIGURE 1. More than 50 extreme-power laser installations are in use or in development throughout the world.
    High peak-power pulsed laser diode arrays are a key enabling technology of the L3-HAPLS petawatt laser at the ELI-Beamlines facility.
    Jan. 27, 2021
    FIGURE 1. Free-space optical (FSO) communication basic principle.
    A shortwave-infrared camera is specially designed for use in closed-loop adaptive optics for free-space optical communications.
    Jan. 27, 2021
    Optomechanical setup for writing a microlens on the tip of an endoscopic fiber via a two-photon process.
    Using two-photon direct laser writing, a microscopic asphere is fabricated on the fiber tip of a fiber-optic microendoscope; the lens is aberration-free.
    Jan. 27, 2021
    FIGURE 1. Schematic representation of fluorophore activation during PCR, where P represents the polymerase, F the fluorophore, and Q the quenching molecule.
    From the initial sequencing of SARS-CoV-2 and the ultraviolet LEDs used in air filtration to spectroscopy-based diagnostic tests like real-time PCR, optics and photonics are enabling...
    Jan. 27, 2021
    (Credit: NASA)
    On May 24, 2018, the Northrop Grumman (formerly Orbital ATK) Cygnus spacecraft arrived at the International Space Station. The vehicle carried, among other things, NASA’s Cold Atom Laboratory.
    Qualifying a versatile ultracold atom experiment for the International Space Station requires many steps, with integrated laser systems playing a key role.
    Jan. 27, 2021
    FIGURE 1. Near-infrared absorption spectrum of Nd:YVO4. For many years, laser designers exclusively targeted pumping the strong peak at 808 nm. The crystal is normally pumped along its b-axis, and the separate plots refer to light polarized to the a- and c-axes.
    Laser diode pump modules emitting in a longer wavelength window dramatically lower the thermal load challenges in DPSS lasers, simplifying power scaling.
    Jan. 27, 2021
    FIGURE 1. The effect of laser wavelength on lateral resolution: A grating with 260-nm-wide lines imaged using a laser scanning confocal microscope with a 658 nm laser (a) and a grating with 120-nm-wide lines imaged using the Olympus LEXT OLS5000 laser scanning confocal microscope with a 405 nm laser (b) are shown.
    For industrial surface measurement, a laser scanning confocal microscope can provide high accuracy and the right roughness parameters for your application.
    Jan. 27, 2021
    (Image credit: SIOM)
    Schematic diagram of multilayer coatings with and without a shell layer.
    A shell layer deposited on an e-beam fabricated coating stack via plasma ion-assisted deposition (PIAD) covers both top and sidewalls, protecting from water.
    Jan. 27, 2021
    The pre-existing coherent beam-combining methods of tiled aperture (left) and filled aperture (center) are contrasted with the new mixed-aperture approach (right).
    A mixed-aperture coherent beam combiner achieves 90% efficiency at low fill factors, and does not require concatenated optics.
    Jan. 27, 2021
    (Courtesy of R. Meleppat, UC-Davis Eyepod Imaging Laboratory)
    This isometric image of mouse retinal pigment epithelium was taken with 561 nm excitation and no emission filter on a modified confocal microscope. Green melanosomes are easily distinguished from golden-yellow lipofuscin granules.
    High-resolution confocal microscopy at four wavelengths identifies melanosomes and lipofuscin in the eye for research on macular degeneration.
    Jan. 27, 2021
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    Combining blue- and red-emitting quantum wells with V-shaped pits in the LED structure leads to a phosphor-free broadband white-light-emitting LED.
    Jan. 27, 2021
    2101 Lfw Nb 2
    Adding a four-sided etched microreflector to a SERS chip results in higher intensity at the surface and a higher signal-collection efficiency.
    Jan. 27, 2021
    2101 Lfw Nb 4
    An AlGaN-based VCSEL with distributed Bragg reflector (DBR) mirrors created via substrate removal using electrochemical etching leads the way for VCSELs for disinfection.
    Jan. 27, 2021
    FIGURE 1. M&A transaction volume and value by quarter.
    Based on intense activity in global financial markets, it appears that photonics technology companies did much more than just survive the pandemic in 2020.
    Jan. 25, 2021
    (Credit: Gerd Altmann/Pixabay)
    Covid 19 5205245 1920
    Despite COVID-19, the overall global laser market continued to grow in 2020. Some laser application areas such as communications prospered, while others such as materials processing...
    Jan. 20, 2021
    (Image credit: Michael Vincent)
    Illinois researchers fabricated a Lüneburg lens that allows light coming into the lens from any direction to be focused to a spot on the surface of the lens exactly opposite the input direction. This is the first time such a lens has been made for visible light.
    Gradient index optics, achromats, and waveguide devices are all 3D-printed in single operations.
    Dec. 3, 2020