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    • Volume 54, Issue 12

    More content from Volume 54, Issue 12

    (Image credit: Erwin J. Alles, University College London)
    Whereas photoacoustic imaging generates sound signals through absorption of light by the object being imaged, this setup uses a dedicated optical ultrasound generator to produce acoustic signals that reflect off the specimen.
    Optical production and sensing of ultrasound lead to an ultrasound probe that could be miniaturized for endoscopic applications.
    Dec. 2, 2018
    FIGURE 1. Advanced driver-assistance systems (ADAS) and fully autonomous vehicle (AV) systems depend on a variety of optoelectronic sensors (a) positioned on the moving vehicle (b) to ensure occupant safety.
    Thermal sensor datasets empower the automotive community to create safer and more efficient ADAS and driverless-vehicle systems in conditions of darkness and through fog and sun...
    Dec. 2, 2018
    (Courtesy of Waymo)
    Waymo’s fully self-driving Chrysler Pacifica hybrid is seen on a public road in Chandler, CA.
    For autonomous vehicles, a choice remains between spinning scanning, solid-state scanning, time of flight, flash, and coherent lidar.
    Dec. 2, 2018
    (Courtesy of Cornell University)
    Enabled by new light sources providing maximum flexibility for optimizing parameters, three-photon microscopy allows nondestructive imaging deep into a wide variety of specimens. This micrograph was acquired at 1330 nm (3 MHz) using a fiber laser designed to optimize three-photon fluorescence excitation in multiphoton imaging (KMLabs’ Y-Fi OPA); it shows mouse brain vasculature and neurons (labeled with fluorescein isothiocyanate-conjugated dextran and green fluorescent protein, respectively).
    Laser innovations that enable balancing of critical parameters provide unprecedented options for quick, nondestructive, high-quality imaging deep into tissue.
    Dec. 2, 2018
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    An indium gallium nitride membrane, when pressurized like a balloon, shifts its near-IR output wavelength by more than 250 nm and could lead to similar widely tunable lasers.
    Dec. 1, 2018
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    A chiral optical metasurface selectively absorbs either left- or right-handed circularly polarized light; it could be useful in imagers and other optical systems.
    Dec. 1, 2018
    (Courtesy of the Holst Centre)
    FIGURE 1. A microLED panel shows how the tiny, closely spaced pixels can be integrated into flexible materials for personal wearable displays.
    2018 produces another crop of innovations in photonics that will affect industry, science, academia, and everyone else as well.
    Dec. 1, 2018
    (Image credit: Hamamatsu Photonics)
    A phase mask created using standard software forms part of the photonic crystal gain cavity of the integrable phase-modulating surface-emitting laser (iPMSEL; a); here, the complex phase mask spells out the text “iPM Lasers” in the far field of the 2D pattern-emitting semiconductor laser (b).
    The gain medium of a semiconductor laser is modified with a photonic crystal lattice and an integrable, configurable phase mask that produces a 2D beam pattern of emission in ...
    Dec. 1, 2018
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    By modeling the complete optical parameters of the human eye using COMSOL Multiphysics software, a prescription for a series of noninvasive laser procedures for presbyopia patients...
    Dec. 1, 2018
    Combining CCD TDI pixels and CMOS readout technology, the UV line-scan imager uses backside illumination and a UV-specific antireflection coating to reach high quantum efficiency...
    Dec. 1, 2018
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    Combining CCD TDI pixels and CMOS readout technology, the UV line-scan imager uses backside illumination and a UV-specific antireflection coating to reach high quantum efficiency...
    Dec. 1, 2018
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    Editor in Chief John Lewis invites you to Laser Focus World’s 31st Annual Lasers & Photonics Marketplace Seminar.
    Dec. 1, 2018
    (Image credit: M. I. Bodnarchuk/Empa)
    Assemblies of colloidal nanocrystals—called superlattices—are shown under white-light illumination; the superlattice structures are composed of 3D cubic-shaped collections of quantum dots with similar physical sizes and optoelectronic emission properties.
    Superlattices of highly monodispersed lead-halide perovskite quantum dots, when illuminated, spontaneously synchronize their quantum-mechanical phase, producing superfluorescence...
    Dec. 1, 2018