采用FPGA和多通道光模块组合实现长距离高速数据传输.pdfVIP

Transferring High-Speed Data over Long Distances with Combined FPGA and Multichannel Optical Modules White Paper Mike Peng Li, Principal Architect/Distinguished Engineer, Altera Corporation Joel Martinez, Sr. Manager, Product Planning, Altera Corporation Derek Vaughan, Applications Engineer, Avago Technologies Today’s copper-based high-speed serial interfaces can deliver data at, multi-gigabit rates. Data transfer rates exceeding 100 Gbps are possible by using multiple lanes in parallel, but are limited in the distance they can travel. One approach that improves the distance is to use optical interconnects rather than copper. Altera Corporation and Avago Technolo- gies Inc. have jointly developed a solution that combines an FPGA and optical transmitter and receiver modules into a single integrated solution that can replace copper interconnects and multiple card-edge optical transceivers. Introduction The ever-increasing quantity of data moving around the datacenter and over the Internet is straining the infrastructure as it struggles to keep up. Core functions such as the storage subsystems, the data switches and routers, and even the computing systems are now I/O limited. External data movement is limited by how fast and how far data can move through the cables and other interconnects that tie all the switches, routers, and storage arrays together. Today’s copper-based high-speed serial interfaces can deliver data at multi-gigabit rates and data transfer rates exceeding 100 Gbps are possible by using multiple channels in parallel. However that speed comes with a catch – limited distance. Basically, the higher the data rate the shorter the distance that the data can traverse without compromising signal integrity, power, and, channel material cost. To compensate for the degradation of the signal, complex signal processing is employed to equalize the signal on the transmit and receive sides. Such an a