Intel claims breakthrough with 40Gbps optical component

Intel has produced a 40G bps laser modulator, but commercial chips remain over the horizon

Intel researchers are a step closer to creating chips that transmit data at high speeds using light instead of electrons, but products based on the technology appear to remain over the horizon.

On Wednesday, a team of Intel researchers unveiled a laser modulator made of silicon that is capable of encoding data at speeds up to 40G bits per second (bps), a significant increase in speed for the company.

The new modulator, which converts electrical data into light, opens the door to high-speed optical interconnects for computers and, when combined with 25 hybrid silicon lasers on a single chip, could be capable of transmitting terabits of data per second, wrote Ansheng Liu, principal engineer at Intel's Corporate Technology Group, in a blog post.

Optical interconnects are desirable because fiber optics offer more bandwidth and carry data farther than copper, which is currently used to connect chips and move data inside a computer. Because they use laser light to transmit data, optical interconnects also eliminate the heat created by resistance as electrons pass through a copper trace.

Liu did not offer any indication of when Intel's silicon-photonics technology will find its way into a commercial product, suggesting commercial products are at least several years away.

Intel has been working on silicon laser modulators for some time, hoping to bring down costs by manufacturing these components with the same technology used to produce silicon computer chips. The company claimed its first breakthrough in 2004, with a 1GHz modulator the company claimed was 50 times faster than any other silicon modulator. The following year, Intel developed a modulator capable of encoding data at speeds up to 10G bps.

The 40G bps speed achieved by the company's latest modulator matches the fastest modulators made using other, more expensive components, Liu said.

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