Co-Packaged Optics CPO (Silicon Photonics・2026年)（コパッケージドオプティクスシーピーオー）
2026年Q4-2027年 commercial deployment予定Co-Packaged Optics・Silicon Photonics Optical I/O technology・Switch ASIC chip周辺 8 Optical engines co-packaged (Optical engines directly mounted next to ASIC silicon・Pluggable optics distance短縮 + Power efficiency 3-4x向上・$0.5-1/Gbps cost reduction) + Broadcom Tomahawk 5 Bailly 51.2Tbps CPO (2024年Q4 announced・2026年 commercial release) + NVIDIA Quantum-X CPO (Quantum-X Photonics Q3450-LD 2026年GTC 800Gbps per port) + Co-Packaged Optics dominant deployment AI Datacenter 800Gbps/1.6Tbps switch generation。
概要
Co-Packaged Optics (CPO) Silicon Photonics は、2026年Q4-2027年 commercial deployment予定Optical I/O technology・AI Datacenter 800Gbps/1.6Tbps switch generation dominant deployment standardization予定next-generation Networking optical interconnect。従来Pluggable Optics architecture (Switch front-panel QSFP-DD / OSFP transceiver pluggable modules + Switch ASIC chip → Front-panel transceiver electrical signal long traces + Pluggable optics electrical-optical conversion + Power inefficient + Cost expensive・$2-3/Gbps level) vs Co-Packaged Optics architecture (Switch ASIC chip周辺 8 Optical engines co-packaged + Optical engines directly mounted next to ASIC silicon + Pluggable optics distance短縮 (Electrical traces<10cm vs 50-100cm) + Power efficiency 3-4x向上 (Electrical signal loss reduction + Optical signaling efficiency) + $0.5-1/Gbps cost reduction (Pluggable optics expensive components elimination) + Higher Bandwidth density per ASIC chip)・Broadcom Tomahawk 5 Bailly CPO (2024年Q4 announced・2026年Q4 commercial release・51.2Tbps switch chip + 8 1.6Tbps optical engines co-packaged + Industry-first CPO commercial product) + NVIDIA Quantum-X Photonics Q3450-LD (2026年GTC announced・Quantum-X InfiniBand switch + Co-Packaged Optics integration + 800Gbps per port + 144 ports = 115Tbps aggregate) + Marvell + Intel + Cisco CPO product roadmaps・AI Hyperscaler Datacenter 800Gbps/1.6Tbps switch generation deployment 2026年-2028年 wave + CPO adoption standardization predicted。
主な特徴・仕組み
- Architecture: Switch ASIC chip周辺 8 Optical engines co-packaged (vs Pluggable Optics front-panel transceivers)
- Electrical Trace Length: <10cm (ASIC-to-Optical engine) vs 50-100cm (ASIC-to-Front-panel pluggable)
- Power Efficiency: 3-4x向上 (Pluggable Optics vs Co-Packaged Optics power savings)
- Cost Reduction: $0.5-1/Gbps level (vs $2-3/Gbps Pluggable Optics・60-75% cost reduction)
- Bandwidth Density: Higher per ASIC chip (Front-panel space constraint relaxation)
- Silicon Photonics: Silicon-based optical components (Silicon Optical Modulators + Silicon Photodetectors + III-V Laser external)
- Deployment Switches: Broadcom Tomahawk 5 Bailly + NVIDIA Quantum-X Photonics + Marvell + Intel + Cisco
- Use Cases: AI Datacenter 800Gbps/1.6Tbps switch deployment + Bandwidth density + Power efficiency requirements
- Timing: 2026年Q4-2027年 commercial deployment始まる + 2028年 mainstream adoption予測
- Industry Drivers: AI Workload bandwidth growth + Datacenter power efficiency requirements + Pluggable Optics cost growth
スペック比較表
| Optical Interconnect | Architecture | Power | Cost | Bandwidth Density |
|---|---|---|---|---|
| Co-Packaged Optics (CPO) | ASIC + 8 optical engines co-packaged | 3-4x efficient | $0.5-1/Gbps | High |
| Pluggable Optics QSFP-DD/OSFP (Current) | Switch front-panel transceivers | Baseline | $2-3/Gbps | Limited by front-panel space |
| On-Board Optics OBO (Interim) | Optics on PCB near ASIC | 2x efficient | $1-1.5/Gbps | Medium |
| Direct-Attach Copper DAC (Short distance) | Copper cables <5m | Most efficient | $0.1-0.3/Gbps | Distance limited |
具体例・対応製品
- Broadcom Tomahawk 5 Bailly CPO: 2024年Q4 announced・51.2Tbps switch + 8 1.6Tbps CPO optical engines・2026年Q4 commercial release・Industry-first CPO
- NVIDIA Quantum-X Photonics Q3450-LD: 2026年GTC announced・InfiniBand switch + CPO integration + 800Gbps per port + 115Tbps aggregate
- NVIDIA Spectrum-X Photonics: 2026年GTC announced・Ethernet switch + CPO integration + AI Datacenter standardization
- Marvell Bonsai CPO: 2025年-2026年 development phase・Marvell Switch chip + CPO integration
- 競合 NVIDIA Spectrum-X800 (Pluggable): 800Gbps Pluggable Optics current generation・CPO migration counterpart
自作PCでの選び方・注意点
Co-Packaged Optics は「AI Datacenter 800Gbps/1.6Tbps switch generation deployment (2026年-2028年 wave + CPO adoption standardization predicted)」「Power efficiency requirements (Datacenter power constraint growing + Pluggable Optics power consumption 30-40W per port vs CPO 10-15W per port = 3-4x efficient)」「Cost reduction (Pluggable Optics $2-3/Gbps growing + CPO $0.5-1/Gbps = 60-75% cost reduction + Hyperscaler AI Datacenter procurement scale)」用途のnext-generation optical I/O technology。AI Hyperscaler Datacenter (Microsoft + Google + Amazon + Meta + Oracle Top 5 Hyperscalers) で AI Workload bandwidth growth (LLM training requirements + Multi-GPU rack-scale interconnect + 800Gbps/1.6Tbps switch generation requirements) + Datacenter power efficiency requirements (PUE 1.1-1.2 targets + Power constraint growing) + Pluggable Optics cost growth で CPO adoption motivation accumulation。Broadcom Tomahawk 5 Bailly CPO (2024年Q4 announced・2026年Q4 commercial release・Industry-first CPO commercial product + 51.2Tbps switch + 8 1.6Tbps optical engines co-packaged) は AI Datacenter Ethernet switch market 2026年Q4-2027年 deployment始まる + Industry adoption first wave。NVIDIA Quantum-X Photonics Q3450-LD (2026年GTC announced・Quantum-X InfiniBand switch + CPO integration) + NVIDIA Spectrum-X Photonics (Ethernet switch CPO integration) で NVIDIA Networking CPO adoption + AI Datacenter NVIDIA dominant adoption acceleration。Marvell + Intel + Cisco CPO product roadmaps発展 + MultiVendor CPO ecosystem maturity 2027-2028年 mainstream adoption forecast。
関連用語との違い
- vs Pluggable Optics (QSFP-DD/OSFP): CPOはASIC co-packaged + 3-4x power efficient + $0.5-1/Gbps・PluggableはFront-panel transceivers + Current generation + $2-3/Gbps
- vs On-Board Optics (OBO・Interim): CPOはASIC co-packaged + Higher density・OBOはPCB near ASIC + Intermediate solution + 2x power efficient
- vs Direct-Attach Copper (DAC・Short distance): CPOはOptical signaling + Datacenter-scale (100m+)・DACはCopper cables + <5m only + Most efficient short-distance
よくある質問（FAQ）
Q1: CPO commercial deployment timing は？ A: Broadcom Tomahawk 5 Bailly CPO 2024年Q4 announced + 2026年Q4 commercial release (Industry-first CPO commercial product) + NVIDIA Quantum-X Photonics + Spectrum-X Photonics 2026年GTC announced + 2027年-2028年 deployment・Industry CPO adoption first wave 2026年Q4-2028年・2028年 mainstream adoption forecast + Marvell + Intel + Cisco CPO product roadmap progression。
Q2: Power efficiency 3-4x improvement 仕組みは？ A: Pluggable Optics power consumption = Electrical signal long traces (50-100cm ASIC-to-front-panel) + Electrical-Optical conversion + Pluggable form factor power overhead (Total 30-40W per port)・CPO power consumption = Electrical traces <10cm (ASIC-to-Optical engine co-packaged) + Higher SerDes efficiency (Lower drive strength required) + Silicon Photonics co-design optimization (Total 10-15W per port)・3-4x power efficient + Datacenter PUE alignment + AI Workload power constraint critical alignment。
Q3: Cost reduction $0.5-1/Gbps mechanism は？ A: Pluggable Optics $2-3/Gbps = Pluggable form factor expensive components (Connector + Casing + Electrical interface + EEPROM management) + Field-replaceable design overhead・CPO $0.5-1/Gbps = Co-packaged form factor eliminates pluggable components + Volume production silicon photonics scaling + Higher integration density・60-75% cost reduction at scale + Hyperscaler procurement scale (Microsoft + Google + Amazon Meta Top Hyperscalers) で Industry adoption acceleration。
まとめ
Co-Packaged Optics (CPO) Silicon Photonics = 2026年Q4-2027年 commercial deployment予定Optical I/O technology。Switch ASIC + 8 Optical engines co-packaged + Power efficiency 3-4x向上 + $0.5-1/Gbps cost reduction + Broadcom Tomahawk 5 Bailly + NVIDIA Quantum-X Photonics + AI Datacenter 800Gbps/1.6Tbps switch generation dominant deployment予定 + 2028年 mainstream adoption forecast。