Artistic rendition of a topological array of vertically emitting lasers. All 30 microlasers along a topological interface (blue) act as one, collectively emitting coherent laser light (red). (Image: Pixelwg, Christian Kroneck)
Artistic rendition of a topological array of vertically emitting lasers. All 30 microlasers along a topological interface ( blue ) act as one, collectively emitting coherent laser light ( red ). (Image: Pixelwg, Christian Kroneck) 09/24/2021 - Israeli and German researchers have developed a way to force an array of vertical cavity lasers to act together as a single laser - a highly effective laser network the size of a grain of sand. The findings are presented in a new joint research paper published online by the prestigious journal Science on Friday, September 24. Cell phones, car sensors or data transmission in fiber optic networks are all using so called Vertical-Cavity Surface-Emitting Lasers (VCSELs) - semiconductor lasers that are firmly anchored in our everyday technology. Though widely used, the VCSEL device has miniscule size of only a few microns, which sets a stringent limit on the output power it can generate. For years, scientists have sought to enhance the power emitted by such devices through combining many tiny VCSELs and forcing them to act as a single coherent laser, but had limited success.
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