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Sumitomo Electric’s 4x25G QSFP28 LR4 optical module and Virtex UltraScale FPGA drive 10km of fiber at OFC 2015

Xilinx Employee
Xilinx Employee
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Sumitomo Electric’s 4x25G QSFP28 LR4 optical module supports fiber links as long as 10km. This OFC 2015 video shows a Xilinx Virtex UltraScale FPGA driving one of these modules and 10km of optical fiber. The QSFP28 has the same footprint as a 40G QSFP+ optical module but it employs four 25Gbps lanes through an upgraded electrical interface. When compared to the alternatives, 100G QSFP28 increases density and decreases both power and price/bit, which is why it is fast becoming the universal form factor for data center optics.