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a) Cleaved coupling section of a bent waveguide bus and a resonator; b&c) Delay line consisting of several ring resonators
Researchers have effectively delayed light's travel for the purpose of chips

IBM has announced that its researchers have built a device capable of delaying the flow of light on a silicon chip, which could lead the further development of using light instead of electricity to transfer data. Researchers have known that the use of optical instead of electrical signals for transferring data within a computer chip might result in significant performance enhancements since light signals can carry more information faster. The engineering challenge is buffering data on the chip, which is difficult given light’s speed. Thus, a means of using light effectively is to delay its travel.

Long delays can be achieved by passing light through optical fibers. IBM scientists were able to delay light by passing it through a new form of silicon-based optical delay line built of up to 100 cascaded "micro-ring resonators," built using current silicon complementary metal-oxide-semiconductor (CMOS) fabrication tools. When the optical waveguide is curved to form a ring, light is forced to circle multiple times, delaying its travel. The optical buffer device based on this simple concept can briefly store 10 bits of optical information within an area of 0.03 square millimeters. This advancement could potentially lead to integrating hundreds of these devices on one computer chip, an important step towards on-chip optical communications.

"Today's more powerful microprocessors are capable of performing much more work if we can only find a way to increase the flow of information within a computer," said Dr. T.C. Chen, vice president of Science and Technology for IBM Research. "As more and more data is capable of being processed on a chip, we believe optical communications is the way to eliminate these bottlenecks. As a result, the focus in high-performance computing is shifting from improvements in computation to those in communication within the system."

The report on this work, "Ultra-compact optical buffers on a silicon chip," is published in the premiere issue of the journal Nature Photonics. This work was partially supported by the Defense Advanced Research Projects Agency (DARPA) through the Defense Sciences Office program "Slowing, Storing and Processing Light."



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Heres the original.......
By crystal clear on 12/28/2006 7:32:12 AM , Rating: 2
You forgot or considered unecessary to include this-


About IBM Research Division

IBM Research is the world's largest information technology research organization, with about 3,000 scientists and engineers in eight labs in six countries. IBM has produced more research breakthroughs than any other company in the IT industry. For more information on IBM Research, visit http://www.research.ibm.com

Photos available at:

http://domino.research.ibm.com/comm/pr.nsf/pages/n...

Additional information on silicon nanophotonics available at: http://www.research.ibm.com/photonics
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This post was made by SQL on Friday, December 22, 2006

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IBM Milestone Demonstrates Optical Device to Advance Computer Performance

IBM (NYSE: IBM) today announced its researchers have built a device capable of delaying the flow of light on a silicon chip, a requirement to one day allow computers to use optical communications to achieve better performance.

Researchers have known that the use of optical instead of electrical signals for transferring data within a computer chip might result in significant performance enhancements since light signals can carry more information faster. Yet, "buffering" or temporarily holding data on the chip is critical in controlling the flow of information, so a means for doing so with light signals is necessary. The work announced today outlines just such a means for buffering optical signals on a chip.

"Today's more powerful microprocessors are capable of performing much more work if we can only find a way to increase the flow of information within a computer," said Dr. T.C. Chen, vice president of Science and Technology for IBM Research. "As more and more data is capable of being processed on a chip, we believe optical communications is the way to eliminate these bottlenecks. As a result, the focus in high-performance computing is shifting from improvements in computation to those in communication within the system..............

IBM scientists were able to meet this size restriction and achieve the necessary level of control of the light signal by passing it through a new form of silicon-based optical delay line built of up to 100 cascaded "micro-ring resonators," built using current silicon complementary metal-oxide-semiconductor (CMOS) fabrication tools. When the optical waveguide is curved to form a ring, light is forced to circle multiple times, delaying its travel. The optical buffer device based on this simple concept can briefly store 10 bits of optical information within an area of 0.03 square millimeters. That's 10 percent of the storage density of a floppy disk, and a great improvement compared to previous results. This advancement could potentially lead to integrating hundreds of these devices on one computer chip, an important step towards on-chip optical communications
http://technology-news-earnings.blogspot.com/

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Hey this is not your article-you did not write it.




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