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Glass Doped with Erbium Could Be Used for Optical Circuits

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A material created by doping glass made from zinc, sodium, and tellurium with the rare-earth element erbium could be used for broadband planar waveguide amplifiers. Scientists have started testing planar waveguides for use in signal transmission in place of long optical fibers, as waveguides make miniaturization easier. Electronic transition for erbium occurs at 1.5 μm — the standard wavelength in telecommunications technologies. Researchers used ultrafast laser plasma doping to incorporate erbium ions as thin films in a silica substrate. A high-intensity (femtosecond) laser...Read full article

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