Research On Very Short Reach High-Speed Parallel Optical Transmission System Based On FPGA

Very short reach (VSR) is an optical transmission technology to transmit data over a short distance (about 300m~600m). It is mainly used to link two equipments of different network layers,such as switch,CR,OXC,ADM and WDM terminals. It has the advantage of easy constructing,stable performance and low cost. It is a new field of optical communication technology development, and gradually becomes a universal standard technology. VSR has become an important part of all optical networks.In this paper, VSR parallel optical transmission system is deeply studied. We design the converter IC of VSR system according to OIF-VSR4-01.0 standard, and implement it using FPGA.We also investigate the existing two parallel VSR standards: VSR4-1.0 and VSR4-3.0, on the basis of whose principle new parallel VSR schemes are introduced. The new schemes can elevate the utilization efficiency of multimode fiber array. They can take full advantage of large system throughput, and supply reference for the future higher data rate upgrading. According to the technical specialities and transmiting request of 10 Gigabit Ethernet (10GbE), the system schemes implementing the high-speed interconnection of 10GE LAN and WAN are introduced and designed. So VSR is transplanted to 10GE successfully to fulfill the short reach transmission with the advantages of easy construct,stable performance and low cost.All designs in this paper are realized using EP1SGX25F1020C7 FPGA of Altera Stratix GX series. Altera's development kit Quartus II and Verilog HDL are used to complete the designs and simulations of converter IC according to VSR4-1.0 and 10GbE's SERDES IC. The structures and simulation results of modules are showed. Through the results, we can draw the conclusion that all of the designs can correctly implement their functions and meet the requests of 10Gb/s high-speed parallel optical transmission system.