光子集成交换结构：从同构集成到异构集成.pdf

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1、Richard PentyPhotonic Integrated Switch Fabrics:from Homogeneous to Heterogeneous IntegrationPhotonic Integrated Switch Fabrics:from Homogeneous to Heterogeneous IntegrationRichard Penty,Qixiang ChengCentre for Photonics Systems,Dept of Engineering,University of Cambridgervp11cam.ac.ukSPECIAL FOCUS:

2、PHOTONICSOptical Switching for AI Data CentresBest performance from an architecture that matches the traffic pattern of the application ML has a large connectivity shift from training to inferenceBandwidth steering with flexible topologies Optical circuit switchingCMPCMPMEMSwitchSwitchGPUGPUGPUGPUME

3、MMEMMEMMEMMEMMEMMEMMEMMEMMEMMEMGPU3GPU1GPU2GPU4CMP1CMP2NIC1NIC2MEMMEMMEMMEMGPUGPUGPUGPUMEMMEMMEMMEMMEMMEMMEMMEMMEMMEMMEMMEMCMPCMPSwitchSwitchOptical SwitchesMEMMEMMEMMEMMEMMEMMEMMEMGPU3GPU1GPU2GPU4CMP1CMP2NIC1NIC2MEMMEMMEMMEMGPUGPUGPUGPUMEMMEMMEMMEMMEMMEMMEMMEMMEMMEMMEMMEMCMPCMPSwitchSwitchOptical S

4、witchesCMPCMPMEMMEMMEMSwitchSwitchGPUGPUGPUGPUMEMMEMMEMMEMMEMMEMMEMIntroduce optical switches in the OC-MCM topology Moderate scales Tens of switches can be collocated on a single chipWork loadLogical connectionPhotonic connectivity mapEarly work on InP all-active SOA switchCompact total internal re

5、flection mirrorsLossless operation 1 W/path 100 pJ/bit*A.Wonfor,H.Wang,R.Penty and I.White,Large Port Count High-Speed Optical Switch Fabric for Use Within Datacenters Invited,in Journal of Optical Communications and Networking,vol.3,no.8,pp.A32-A39,August 201116x16 All-active SOA switchEarly work o

6、n InP active-passive SOA switch-95-95-75-75-55-55-35-35-15-15Power dBmWavelength nm155015501549154915491549.5.515501550.5.51551155153 dB/0.1nm53 dB/0.1nmONONOFFOFF0 00.40.40.80.81.21.21.61.62 2-18-14-10-6-22Power penalty dBInput power dBmLarge extinction ratioLossless operation Moderate ASE levelDif