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Optical interconnects using polymer waveguides on circuit boards have been demonstrated. Wirebond-free ultradense transceivers provide 160 Gb/s bidirectional throughput with 16 parallel waveguide-connected transmitters and receivers. Initial designs use 985 nm VCSELs. Migration to the industry-standard 850 nm VCSEL wavelength is underway, also providing lower waveguide loss.
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