Fujitsu working on 100Gbit/s optics

Fujitsu is developing its own 100Gbit/s optical modules, shunning other manufacturers products. The company will be using its optical modules for its Flashwave product line, which will ship in the fourth quarter of next year.*

The launch is another example of equipment vendors building their own 100Gbit/s modules rather than relying on the optical components industry. Fujitsu was presumed to be using a 40Gbit/s coherent receiver developed by CoreOptics. However, this doesn’t seem to be the case. Tom McDermott, a Fujitsu strategic planner, told Light Reading that Fujitsu’s 100Gbit/s modules have “always been an organic” project.

Fujitsu already has the technology to develop a 100Gbit/s module. Its Microelectronics Europe arm has worked on the analog/digital converter and digital signal processor, both of which go into the coherent receiver of the chip.

It’s not all plain sailing – with the chip requiring speeds beyond what’s available commercially (56 billion samples per second), and Fujitsu made it harder opting for a soft-decision Forward Error Correction, which is a microwave radio technique that requires stronger coding than a conventional chip.

Fujitsu’s 100-Gbit/s transponder will conform to the CFP multisource agreement for client interfaces and Fujitsu also plans to release a muxponder that carriers 10 lanes of 10 Gbit/s.

Both would be fabricless, meaning they aren’t designed for aggregating disparate streams of traffic into a 100Gbit/s payload.

* Corrected from the first quarter, with apologies. Ed.