Bridge Fault Simulation And Detection Of MRs

With the silicon integration technology and optical device manufacturing rapidly growth,optical interconnection technology has become a trend to replace metal interconnection.The data transmission rate requirements between traditional multi-cores continue to increase,as well as the application of WDM,the transmission bandwidth,data transmission rate,delay and energy consumption of the network are more meet the development requirements,which forces Optical Network-on-Chip(ONOC)has become a new and efficient on-chip communication system.Microring resonator(MRs),the core device of ONOC,its own manufacturing process and high sensitivity to temperature fluctuation,it is easy to cause thermal drift and bridge fault,which leads to communication data errors in network system transmission and reduces the security and reliability of ONOC.Bridge fault is the key factor that affects the reliability of ONOC.Based on this,this paper focuses on the task of the Guangxi Natural Science Foundation of China's joint funded cultivation project(2018GXNSFAA138115),and conducts fault simulation and detection for bridge fault of microring resonator,the main contents of this project are as follows:1.In this paper,the core components of network on optical chip and microring resonator and optical waveguide were analyzed.The working principle of MRS,the coupling mode with optical waveguide and the resonance condition were then studied.Based on above,the definitions of two kinds of bridge fault were introduced,and the bridge fault model was established to complete the design of bridge fault simulation device of optical router.In the case of single fault,this device can set the fault through the control signal and get the fault simulation diagram.Finally,the effectiveness of the bridge fault simulator is verified by four kinds of classical optical routers.2.The number of bridge faults in optical router was detected.Based on the path of optical router to find the bridge fault microring,first the detection model of bridge fault number was established,then the structure of optical router was initialized,three kinds of optical paths were established,namely through optical path,single resonant optical path and multi resonant optical path,and finally the number of bridge faults under each optical path were accumulated.Through the experimental verification,the experimental results are consistent with the theoretical analysis,which improves the efficiency of finding the number of bridge faults in the network on optical chip,and provides a favorable basis for the subsequent bridge fault detection.3.The detection of the bridge fault of the optical router was completed.Based on graph theory,the optical waveguide and microring resonator in optical router were modeled as a weighted digraph.According to the bridge fault detection graph FCG,the bridge fault detection problem is transformed into the calculation of the vertex out degree and in degree of the graph.By analyzing the FCG of classical optical router,and according to the bridge fault location method of optical router,the bridge fault detection is completed.The bridge fault coverage rate of this method can reach 100%.