LightPulses
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IBM keeps light pulse bandwagon rolling, uses 'em for chip-to-chip communication
Lenovo loves its red mousing nipple, Apple digs its aluminum and IBM adores those light pulses. Nearly two full years after we heard this very company touting breakthroughs in science thanks to a nanophotonic switch, in flies a similar technique from Yorktown Heights that could "greatly further energy efficient computing." As the story goes, gurus at IBM have figured out how to replace electrical signals that communicate via copper wires between computer chips with tiny silicon circuits that chat using pulses of light. The device is called a nanophotonic avalanche photodetector, and according to Dr. T.C. Chen, this kind of embedded optical interconnection makes the "prospect of building power-efficient computer systems with performance at the Exaflop level" something that could be seen in the not-so-distant future. Reportedly, the avalanche photodetector demonstrated by IBM is the world's fastest device of its kind, able to receive optical information signals at 40Gbps and simultaneously multiply them tenfold. We know that's over some of your (read: our) heads, but there's a sufficiently nerdy video after the break that gets right down to the whos, whats, whys and wheres.
IBM's light pulse love affair continues with tiniest nanophotonic switch
Merely months after IBM first inserted silicon nanophotonics into our memory bank, and just weeks after we drooled all over ourselves reading about its green optical link, the mega-corp has chosen St. Patrick's Day to trumpet the development of the "world's tiniest nanophotonic switch." The device, which boasts a footprint "about 100 times smaller than the cross section of a human hair," is said to be a vital part of creating an on-chip optical network. More specifically, it's bringing the gurus behind it one step closer to conjuring up multi-core CPUs that transmit data with light pulses rather than relying on electrical signals on copper wires. This particular switch would essentially divert traffic within the network, ensuring that "optical messages from one processor core could efficiently get to any of the other cores on the chip." Keep on livin' the dream IBM -- just ping us when this stuff is anywhere near ready for the commercial market.
MIT using disco-style lighting to calm erratic brain activity
MIT's brainiacs aren't exactly new to the world of partying, and now scientists at the MIT Media Lab have invented a way to "reversibly silence brain cells using pulses of yellow light." The presumably rave-inspired pulsing design offers up the prospect of "controlling the haywire neuron activity that occurs in diseases such as epilepsy and Parkinson's disease," which could theoretically lead to the creation of "optical brain prosthetics to control neurons, eliminating the need for irreversible surgery." Aside from being thrilled that this stuff could help us avoid dodgy robot-led surgeries, it could also help gamers who tend to suffer from epileptic fits when dealing with those head-mounted displays. Additionally, the team is also looking at utilizing the new system to more effectively study neural circuits, but considering that this technology has the ability to "exert exquisite control" over individual neurons within you dome, we certainly hope Big Brother doesn't get ahold of this.[Via Slashdot]
