Plastic optics boosted to 25 Gbit/s
VI Systems (Berlin) reports that it has achieved 40 Gbit/s in the lab and is aiming for 100 Gbit/s performance.
Georgia Tech’s demonstration used VI Systems’ VCSEL at 850 nanometers wavelength, transmitting at 25 Gbit/s over a long 100 meter plastic fiber. This compares to plastic fibers typical use for shorter runs and 650 nanometers wavelengths at speeds up to 1 Gbit/s in home networks and as slow as 50 Mbit/s for in-car automotive networks. As a result, VI System predicts that these and similar cost-sensitive applications can now boost their performance up to the 40-to-100 Gbit/s range.
Georgia Tech reported that its transmission demonstrations were error free over cables with 80-micron core plastic optical fiber using relaxed coupling tolerances as high as 35 microns. In the lab, VI Systems reports speeds up to 40 Gbits/s when coupled with high-speed photodetectors and transimpedance amplifiers.
Individual VCSELs fit on a 250 micron square die, but can also be obtained from VI Systems in 1-by-4 or 1-by-12 arrays for proprietary home and automotive networks, as well as for Fibre Channel, Infiniband and other high-speed applications.
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