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Jan 30th, 2013
At DesignCon, Cisco showed silicon photonics integration on 2.5D interposers
Cisco systems is prototyping silicon photonics using 2.5-D silicon interposers, according to a senior engineering executive in a keynote at DesignCon here.
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The communications giant is one of a handful of companies trying to harness the technology to drive down the costs of next-generation networks.

The convergence of optical and semiconductor ecosystems will have a huge impact for networking at 40 and 100 Gbits/second and beyond,” said Bill Swift, who leads Cisco’s transceiver and module group.

Swift showed a rough diagram (below) of a 2.5-D chip that included a laser light source, optical lenses and isolators along with what appeared to be a CMOS modulator and multiplexor. “This is stuff we are working on now, and I find it very exciting,” he said.

He declined to comment on reports the company will ship this year samples of 100G silicon optical modules based on the LX4 standard. Cisco bought silicon-photonics startup Lightwire (Allentown, Penns.) in February 2010 for $271 million.

To read more: http://www.eetimes.com/electronics-news/4405844/Cisco-packs-silicon-photonics-on-3-D-ICs



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