Optical networking offers the potential to dramatically improve data transfer rates by speeding the flow of data using light pulses, instead of sending electrons over wires. IBM's chipset offers the ability to move information at blazing speeds of 160 Gigabits -- or 160 billion bits of information in a single second. In addition, by shrinking and integrating the components into one package, and building them with standard low-cost, high-volume chip manufacturing techniques, IBM aims at making optical connectivity viable for widespread use.
The technology could be integrated onto printed circuit boards to allow the components within an electronic system ? such as a PC or set top box -- to communicate much faster, dramatically enhancing the performance of the system itself.
To achieve this new level of integration in the chipset, IBM researchers built an optical transceiver with driver and receiver integrated circuits in current CMOS technology, the same standard technology used for most chips today. They then coupled it with other necessary optical components made in more exotic materials, such as indium phosphide (InP) and gallium arsenide (GaAs), into one, integrated package only 3.25 by 5.25 millimeters in size.
This compact design provides both a high number of communications channels as well as very high speeds per channel, resulting in an amount of information transmitted per unit area of card space taken up by the chipset (the ultimate measure of viability for practical use) that is the highest ever. This transceiver chipset is designed to enable low cost optics by attaching to an optical printed circuit board employing densely spaced polymer waveguide channels using mass assembly processes.
The report on this work, "160-Gb/s, 16-Channel Full-Duplex, Single-Chip CMOS Optical Transceiver," by C.L. Schow, F.E. Doany, O. Liboiron-Ladouceur, C. Baks, D.M. Kuchta, L. Schares, R. John, and J.A. Kash of IBM?s T. J. Watson Research Center, Yorktown Heights, N.Y. will be presented on March 29 at the 2007 Optical Fiber Conference in Anaheim.