Blue diode laser designs with kW powers are advancing in industrial processing applications, including cutting, welding and foil joining of copper and other high-reflectance materials.by Valerie C. Coffey
An emerging class of 2D semiconductors, so-called metal-organic frameworks, offers intriguing potential as an active element in optical applications.by Himani Arora, SangWook Park, Renhao Dong and Artur Erbe
The coronavirus and its associated economic dislocations have complicated the technology’s 2020 rollout. But the changes wrought by the pandemic may boost the case for 5G in the long run.by Stéphane Téral and Becky Bosco
Departments and Columns
Optical seismometer monitors volcano / Laser test of facemask / Quantum secret sharing / Machine learning / Quantum-dot nanopixels / Diode laser beginnings / Luminar Technologies merger / Display calibration puzzles / Spectroscopic cardiac imaging
On 9 July 1962, Robert J. Keyes of MIT Lincoln Labs reported observing intense luminescence with a quantum efficiency of ~85 % from GaAs junctions at 77 K. Within months, four research teams would independently develop and demonstrate injection lasers.
At the 2020 OSA Laser Congress, a solid-state laser pioneer will guide attendees through laser history—and illuminate some behind-the-scenes insights along the way.
Coronavirus has plagued 2020 with economic uncertainty—however, OSA’s senior industry advisor predicts that the laser industry may weather the storm better than most.
The small heat-affected zone of laser pulses, and their potential to etch tiny features with little damage to the surrounding material, helped launch the sector of laser micromachining.
Also in this Issue
UA news / NSF quantum photonic workshop / Subsea school Mini Dive / Advanced Photonics Congress / Siegman School / CLEO Pacific Rim / OSA Fellow stories / Thanks, editors and volunteers
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