Augmented Silicon Photonics for Data Center and AIML optical interconnects.pdf

1、Yannick PAILLARD,Chief Commercial Officer,SCINTIL PhotonicsAugmented Silicon Photonics for Data Center and AI/ML optical interconnectsSPECIAL FOCUS:OPTICSOPTICSNetwork Performances Must Scale Faster to Support AI NeedsEast West traffic ComputesTrafficNorth-South traffic UsersGenerative AIIntelligent

2、 AppsAI Factory Machine Learning CloudTraditionalx 2 x 4 x 2 x 4 x 8 TrafficDevelopment cycle of high-speed interfaces is not fast enough,parallelism is required Cost and Power increase much faster than the rest of the compute system AI workload diversity pushes for new/composable optical network ar

3、chitectureIncreasing Speed of Optics Comes with Challenges 4 42 2Number of lanesIncrease baud rateHigher Modulation order QAMQAM-161656G56G112G112Gx 4 x 4 x 8 x 8 x 16 x 16 ParallelCWDM 4,8DWDM 8,16,32IntegrationIntegrationLatencyLatencyChallengesChallengesPAMPAM-4 4Optics for AI Scale Up,mainly par

4、allel todayAI accelerators+HBMCXL DDR controler DDRDDRDDRPCIeCPUs+DDRCXL DDR controler DDRDDRDDRPCIeCXL DDR controler DDRDDRDDRPCIePCIePCIePCIeCXL SwitchAEC/AOCPCIe/CXL SwitchAEC/AOC800G-ParallelPluggable OpticsEthernetor proprietaryp2pPacket SwitchingOptics with Optical Circuit Switching,requires W

5、avelength Division Multiplexing(WDM)AI accelerators+HBMCXL DDR controler DDRDDRDDRPCIeCPUs+DDRCXL DDR controler DDRDDRDDRPCIeCXL DDR controler DDRDDRDDRPCIePCIePCIePCIeCXL SwitchCPOI/OPCIe/CXL SwitchCPOI/0800G/1.6T MultiplexCWDM,LWDM,DWDM DWDM External Laser SourceOCSPluggable OpticsEthernetor propr

6、ietaryOCSBased on standard silicon photonics available from commercial foundries and massively deployed in datacentersScintil Augmented Silicon PhotonicsIntegrate the Lasers on the backside of the silicon photonic wafer(after flipping it)LASERSGeSiNSOI SubstrateGeSiNSiSi and SiN passivesGe PDSi MODF