Communications of the ACM
ltra-High-Speed Optical Communications Link Sets New Power Efficiency Record
Part of an optical link test chip, showing the photo diode and receiver circuits.
Credit: IBM
IBM researchers have found a way to move large amounts of data within supercomputers while keeping power consumption in check.
The team combined circuits in IBM's 32-nanometer silicon-on-insulator complementary metal-oxide-semiconductor technology with vertical cavity surface-emitting lasers and photodetectors. The IBM T.J. Watson Research Center's Jonathan E. Proesel and colleagues created a power-efficient optical communication link operating at 25 Gbps using just 24 milliwatts of total wall-plug power.
"Compared to our previous work, we have increased the speed by 66 percent while cutting the power in half," Proesel says. "We're continuing the push for lower power and higher speed in optical communications. There will always be demand to move more data with less energy, and that's what we're working toward."
From PhysOrg.com
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