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Infinera details Terabit PIC transmitter at OFC

Posted: 15 Mar 2011 ?? ?Print Version ?Bookmark and Share

Keywords:Terabit PIC? FlexChannels? line-width lasers?

Infinera has described a Terabit photonic integrated circuit (PIC) transmitter through a paper presented at the OFC/NFOEC last week. According to the company, the Terabit PIC transmitter integrates ten 112Gbit/s wavelengths.

The work is far in advance of today's mainstream communications now moving from Gbit to 10Gb channels for 100Gbit/s Ethernet. Many engineers are preparing to shift to 25Gbit/s channels for a more cost-effective second generation of 100G Ethernet based on 4x25G channels rather than the 10x10G channels used today.

Infinera principal engineer Peter Evans detailed the use of narrow line-width lasers and dual states of polarization to achieve a data rate of 112Gbit/s per channel. In a demo of the device, Infinera claimed it showed error-free transmission was achieved for all ten channels.

Infinera would not say when the prototype device could be made into a commercial product. Infinera's 500Gbit/s PIC is planned to be commercially available in Infinera systems next year. Infinera plans to deliver systems based on PICs with 1Tbit/s capacity or greater in future systems.

Terabit PICs will enable networks to scale to capacities up to 25Tbit/s, Infinera said. The company also claims its FlexChannels technology provides a more cost-effective approach to such high-throughput channels than competing alternatives.

The integration of large numbers of lasers and other optical components into PICs reduces the cost-per-bit of reaching high levels of fiber and system capacity compared to using conventional discrete-based optical networks, the company said.

"As we collapse layers in the network, PICs are the technology that enables us to deliver a digital optical network with unconstrained bandwidth throughout the network, pervasive, integrated switching, and the capability to deliver additional packet features cost-effectively," said David Welch, Infinera co-founder and chief strategy officer.

Infinera posted a video of its work in 500Gbit/s and Terabit PICs.

- Rick Merritt
??EE Times

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