25G ONU光模块的高速性能设计与实现OA北大核心

Optimizing the eye diagram performance of the transmitting optical signal and the sensitivity of the receiving signal of the optical module is the key to improving the transmission link budget of the high-speed optical network unit(ONU)optical mod-ule.A 25G ONU optical module with high speed performance is designed.First,the processing skills of high-speed signal line impedance discontinuity and the mechanism of the impact of printed circuit board(PCB)punching process design on the bandwidth performance of transmission signal line are thoroughly studied.Then,the reference stack structure is adjusted and the via process mode is optimized.Finally,the high-speed signal simulation and analysis are carried out.The test results show that the designed module not only fully meets the performance requirements of the transmitting eye diagram and receiving sensitivity,but also has a performance margin far exceeding the IEEE802.3ca protocol standard.