The design and measurement of40Gbps Very Short Reach (VSR) parallel optical transmission system are presented. The transmitter and receiver are implemnted using Altera Stratix Ⅱ1GX PFGA which has embedded high-speed transceiver. By configuring the high-speed transceiver correctly, using window generator and sharing the window comparator within the deskew module,the hardware area is reduced greatly. Binary search is also employed in the frame synchron modtule to raise the circuit speed. Additionally,a 12 × 3.318Gbps VCSEL transmitter is researched and works correctly. At last, the VSR5 point-to-point measurement is undertaken by connecting the receiver and transmitter via a 7-meter 400MHz·km 62.5μm multi-mode fiber ribbon and Agilent tester. Under the continuous test of 2 hours,a system bit error rate( BER) of lower than 10-12 is obtained.%介绍了40Gbps甚短距离(vsR)并行光传输系统的实现和测试.用两片Altera Stratix II GX FPGA分别实现发送/接收转换芯片,通过对FPGA内嵌的吉比特收发器的合理配置,以及在去斜移电路中采用滑动窗口生成器和共用窗口比较器的方法节省了硬件资源;基于异或定位原理,采用二分查找法大大提高了帧同步电路的速度.自制的12通道垂直腔面发射激光器(VCSEL)的工作速率达到了12X 3.318Gbps.利用Agilent 81250误码仪,通过并行光发射/接收模块和7米长的12芯多模带状光纤,成功实现了SDH STM256/0C768的点到点测试,连续两小时的测试结果表明,系统误码率小于10-12,满足设计要求.
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