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    • Volume 54, Issue 07

    More content from Volume 54, Issue 07

    (Courtesy of MPB Communications)
    FIGURE 1. This high-power 607 nm visible fiber laser is used to excite the fluorescent protein mCardinal (a); the laser’s beam profile shows an M2
    Frequency doubling, frequency combining, and Raman shifting allow near-IR fiber lasers to produce visible light for science and industry.
    July 1, 2018
    FIGURE 1. A schematic diagram of a conventional AMOLED display device with light emission through the semi-transparent metal cathode layer is shown.
    Thermal evaporators that promote low particle defects in metal cathode layers allow OLED devices to compete with alternative display technologies.
    July 1, 2018
    (Image credit: Joseph Shaw/Montana State University)
    An all-sky Infrared Cloud Imager (ICI) uses an inexpensive polished aluminum sphere to reflect the entire sky into a low-cost thermal LWIR camera.
    A compact thermal imager measures spatial and temporal patterns of clouds across the entire sky using a low-cost reflective sphere and commercial bolometer camera.
    July 1, 2018
    Electroluminescence spectra below and above the laser-threshold current (Jth) are shown for experimental yelow-orange-emitting laser diodes grown on (211) and (322) substrates (left and right, respectively).
    The experimental device emits 300 ns pulses at a 1 kHz repetition rate.
    July 1, 2018
    (Image credit: Tianjin University)
    Using interferometric principles, a simple angled fiber end can serve as a temperature sensor, operating over a broader range of temperatures than many other fiber-optic-based designs.
    Compared to more complex Bragg gratings and photonic crystal fibers, a simple angled optical fiber end can sense temperature over an expanded range.
    July 1, 2018
    (Image credit: Business Wire)
    Technology newly approved by the FDA provides quantitative measurement of blood-vessel density in the optic disc; this image, taken from a patient with glaucoma, shows loss of retinal nerve fiber.
    Optical coherence tomography angiography (OCTA) has achieved another milestone: mainstreaming of quantification.
    July 1, 2018
    An optical cooler keeps an HgCdTe sensor at cryogenic temperatures without producing vibration via laser-cooling a YLiF4:Yb3+ crystal (a). An undoped YLF crystal serves as a thermal link; the laser-produced fluorescence is dumped into TiNOX-coated clamshell surfaces (b). Cooled to 134.9 K, the optical sensor is part of a commercial FTIR spectrometer made by Midac (Westfield, MA). Turning on the HgCdTe optical sensor causes it to heat up by 2.5 K (an estimated 8 mW heat load).
    A mercury cadmium telluride IR sensor in a working Fourier-transform infrared spectrometer is all-optically cooled to 135 K.
    July 1, 2018
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    Combining 3D-SHOT with multiphoton imaging enables read and write operations with individual neurons precisely in time and space.
    July 1, 2018
    Scientists have discovered a novel particle acceleration mechanism called microbubble implosion.
    July 1, 2018
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    New thin-film-transistor (TFT) technology will increase efficiency and luminance while decreasing cost.
    July 1, 2018
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    Researchers have characterized the laser-induced damage threshold (LIDT) for CMOS and CCD cameras, as well as digital micromirror devices.
    July 1, 2018
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    Newly created membrane lasers of nominal 200 nm thickness can easily lase when illuminated with another laser source.
    July 1, 2018