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  • Volume 61, Issue 04

    • Volume 61, Issue 04

    Credit: RubinObs/NOIRLab/SLAC/NSF/DOE/AURA/A. Pizarro D.
    NSF–DOE Vera C. Rubin Observatory team before installing the LSST Camera on the Simonyi Survey Telescope in March 2025.
    April 25, 2025
    Credit: Nanjing University of Posts and Telecommunications
    A mobile optical communication network allows seamless connectivity across air, land, and underwater environments.
    April 10, 2025
    Credit: Jacqueline Ramseyer Orrell/SLAC National Accelerator Laboratory
    Shubhadeep Biswas, then-SLAC project scientist (left), and Matthias Kling, professor of photon science and applied physics at Stanford University and the director of the Science, Research and Development Division at SLAC's Linac Coherent Light Source (the laser isn’t on).
    April 9, 2025
    Credit: Stelios Tzortzakis/ISEL-FORTH
    FIGURE 1. The optical system encrypts information as a hologram that is scrambled when sent through a small container of liquid, then uses a neural network for decryption.
    April 7, 2025
    A new route to chaos: Starting from a subharmonic frequency (the single peak), sidebands emerge as the control parameters is tuned (the modulated subharmonic state). Many frequencies form a very broad spectrum, which indicates chaos is being generated.
    April 4, 2025

    More content from Volume 61, Issue 04

    Credit: Relativity Networks
    Relativity Networks’ hollow-core fiber (HCF).
    In this Q&A with Relativity Networks’ CEO Jason Eichenholz, he introduces us to the startup he cofounded and explains why hollow-core fiber is enabling the next revolution in ...
    April 2, 2025
    The team—left to right: Qinmiao Chen, Randy Stefan Tanuwijaya, Jensen Li, and Tailin An—with their optical setup.
    Quantum optics and advanced nanophotonics combo enables precise control of entangled holographic information.
    March 28, 2025
    FIGURE 1. 4D imaging radar, powered by high-resolution point cloud data, is revolutionizing automotive safety and autonomy by enhancing a vehicle’s ability to perceive and predict its surroundings in real time.
    Combining 4D imaging radar with other radar sensors and cameras delivers high-resolution spatial data and precise velocity measurements to track and predict the movement of multiple...
    March 28, 2025
    Credit: Milad Abolhasani
    A new method to tune quantum dot bandgaps taps light—which speeds the process, and is more energy-efficient and environmentally sustainable. (Credit: Milad Abolhasani)
    Existing methods to tune bandgaps of perovskite quantum dots—which are less than ideal because they rely on chemical modifications or high-temperature reactions—just got an environmenta...
    March 26, 2025
    (Credit: Exail)
    The full process of fabrication of Exail’s micro-optical assembly in free space—from active optical alignment to gluing and assembling process—is based on technologies proven for the constraints of space deployment.
    Exail recently helped demonstrate ultrahigh-speed (10 Gbps) optical downlink and uplink transmissions between the TELecoms on all Earth Orbits (TELEO) geostationary in-orbit demonstrato...
    March 24, 2025
    (Credit: Phlux Technology)
    FIGURE 1. The functional elements of a time-of-flight (ToF) laser rangefinder (LRF) where the return signal is detected by an avalanche photodiode (APD).
    By offering improved sensitivity, extended range, and faster recovery times, the latest generation of avalanche photodiodes (APDs) are poised to revolutionize the field of distance...
    March 21, 2025
    FIGURE 1. Modeling of femtosecond pulse propagation can be achieved by solving the nonlinear Schrödinger equation via COMSOL; the inset is an image of a filament of plasma [2].
    Plasma channels produced by self-focusing ultrashort laser pulses can disrupt and deflect laser beams and may offer a future defense against adversarial laser systems.
    March 20, 2025
    Credit: Corning
    EXTREME ULE Glass material withstands extreme ultraviolet (EUV) lithography.
    Glass, in its many forms, is central to our future with artificial intelligence.
    March 17, 2025
    ID 42281235 © Igor Dolgov | Dreamstime.com
    dreamstime_xxl_42281235
    Optics company leaders share their thoughts on the critical material export ban from China to the U.S., and how it is impacting optics manufacturers.
    March 3, 2025
    (Photo credit: Artiom Skripka)
    Artiom Skripka in front of a fume hood where the scientists synthesize their nanomaterials. (Photo credit: Artiom Skripka)
    Scientists discover a robust and scalable nanomaterial can act as a binary optical switch or a tiny memory unit—and this all-optical process can be controlled to store information...
    Feb. 20, 2025
    (Photo credit: Mikko Raskinen)
    Professor Hele Savin (left) and her group used the Micronova micro- and nanofabrication center at Aalto University to fabricate their germanium infrared photodiodes.
    Researchers create a germanium infrared photodiode that’s 35% more responsive at 1.55 µm—a common wavelength for telecommunications—than its other germanium and indium gallium...
    Feb. 19, 2025