Performance Analysis Of Multi-Port Optical Router On Chip

Burgeoning nanotechnology and integration technology force the totality of processors integrated on each chip to grow with each passing day,which compels the major network to dispose of more data simultaneously.Because the conventional metal interconnection network owns certain shortcomings containing low bandwidth,high loss,high time lag,therefore,metal wiring technology adopted to connect the processors has grown to be a master factor hindering the rapid growth of multi-core systems on chip(SoCs).At the historic moment,the optical interconnect arises and gets attention of legion academicians thanks to its incomparable merits comprising of low loss,high bandwidth,low latency,and lots more.In pace with the intensive study of this technique,it has been deemed to be the most potential candidate for supplanting the traditional metal interconnection in the multi-core SoCs.Hence,the optical network-on-chip(ONoC)has been given increasing attentions.With the upgrading of data delivered in the contemporary switching networks,wavelength division multiplexing(WDM)has been brought in ONoC to further raise its bandwidth.Because the WDM technology cherished by many scholars could raise the bandwidth of ONoC obviously,thus WDM-based ONoC has become one of the research hotspots.Although WDM can improve the communication bandwidth of the ONoC,it brings some disadvantages,such as four-wave mixing(FWM).ONoC is one of the major components of the multi-core SoCs,and its kernel is optical router.Therefore,the quality of optical router will impact the performance of ONoC even the whole multi-core communication system on chip.Consequently,inorder to further understand the characteristics of ONoC and promote the development of the multi-cores communication system in future,the well-informed study of the optical router used in ONoC is an indispensable part of the development process of the ONoC.Here,the dissertation has chiefly groped for the basic characteristics of the N-port optical router employing single wavelength and N-port optical router utilizing WDM.The dissertation has put forward a theoretical model of N-port optical router with single wavelength and N-port optical router utilizing WDM,and build a simulation platform for simulation.The model could study the transmission loss,crosstalk noise,optical signal-to-noise ratio(OSNR),bit error rate(BER),and so on.The simulation platform could study the transmission characteristics of the signal transmitting in the optical router.The results show that when the number of the ports of the optical router increases constantly,the average OSNR of the signals conveyed in it diminishes by degrees.For instance,the average OSNR of the five-,six-,seven-,eight-port optical routers is2.27 dB,1.24 dB,0.37 dB,-0.37 dB,respectively.The simulation results have turned out that loss of the signals adopting variant wavelengths in the identical path is diverse.In the five-port optical router,the signals delivered from 0 input port to 2 output port have been taken into account,for the two signals whose wavelengths are 1542.1nm and1545.3nnm,their loss is-2.72 dB and-3.10 dB,respectively.The loss is also different while the same signal conveys in various paths.For instance,as the signal whose wavelength is 1540.5nm delivers among different input-output ports,and its loss ranges from-5.66 d B to-0.99 dB.Besides,the several other indicators(crosstalk,OSNR,BER)also have the same phenomenon.