Intel Develops Silicon Hybrid Laser Chip
September 18, 2006 5:30 PM
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High performance light-based computers in the horizon
Researchers at Intel and the University of California, Santa Barbara
the world's first Hybrid Silicon Laser
, or HSL. An HSL is a silicon-based laser emitting device. According to Intel, creating a laser emitting silicon chip is a breakthrough that will propel the world of computers into the light-based transmission era.
Called Indium Phosphide, the material contains properties that allow it to emit light when voltage is applied. Intel researchers were able to integrate Indium Phosphide into traditional silicon chip manufacturing techniques, thereby creating a silicon-Indium Phoshide hybrid chip -- one that could process traditional electrical signals and transmit laser light. The laser light generated by an HSL chip could be used to transmit data and thus power other silicon photonic devices said Intel.
“Silicon Photonics is a critical part of tera-Scale computing as we need the ability to move massive amounts of data on and off these very high performance chips" claimed Intel Chief Technology Officer Justin Rattner. Intel said that HSL could bring along terabit-capable transmission processors that are low cost and easy to produce. Computers would be a multitude more powerful than those we use today. The technology however, is still a number of years off.
Currently, silicon chips can detect light, route light and even modulate light said Intel, but the problem is getting silicon chips to produce light. Intel is taking Phoshide lasers commonly used in other industries and bringing along new types of applications. Voltage is first applied to the HSL. The Indium Phosphide element then produces light, which then enters a silicon waveguide to create continuous laser light. Using this technique, Intel also maintains a low cost production of HSL devices. According to Intel:
The hybrid silicon laser is a key enabler for silicon photonics, and will be integrated into silicon photonic chips that could enable the creation of optical “data pipes” carrying terabits of information. These terabit optical connections will be needed to meet the bandwidth and distance requirements of future servers and data centers powered by hundreds of processors.
The application potentials for HSL chips are truly exciting. The industry in general has been talking about laser or light based electronics for a number of years already. With the development from a company like Intel -- and hopefully others like AMD -- the industry is getting the right push it needs. With multi-core processors now the mainstream, computers will only get faster. HSL devices will drive the future of computing said Intel, and things are looking only brighter. Communications technology uses a fair number of laser electronics and as the technology is refined, desktop computer and notebooks will be using the technology in the next few years as the limits of traditional silicon is reached.
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9/19/2006 7:21:11 PM
Transmission speed is dependant on bandwidth, while transmission resolution is dependant on switching speed.
You can potentially pack much more into a beam of light than you can into a column of electrons.
Instead of merely increasing the transistor speed to keep up with the rate at which data is recieved by such significantly high-bandwidth bus, also increase it's transistor count.
Easily, double, triple, quadruple, etc... the performance.
This is already done without optical interconnects to meet the demands of powerful processors - it can easily be adapted to an optical bus, with a significant plus to performance.
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