Trends›Optics displaces copper in the datacentre
Optics displaces copper in the datacentre
As datacentres scale out, optical interconnect displaces copper at successively shorter reaches (pluggable, then linear-drive, then co-packaged), so light wins in-datacentre data movement by 2030.
58 ↑2 confidence, computed 23 Oct 2026
- Technical
- High weight
Rests onfacts underneath
What rests on thismarkets it underwrites or threatens
Underwrites
Threatens
Evidencethe schedule the figure draws
The evidence, newest first
- Oct 2026
neutral · claim Nvidia and Cisco have specified a 400G-per-lane pluggable module (12.8 Tb/s, ~4x density over 200G-lane pluggables, no date). NVIDIA and Cisco introduce USFP pluggable optics form factor - Aug 2026
for · observable Nvidia's Ethernet CPO switch is in production for Vera Rubin. NVIDIA Spectrum-X Ethernet Photonics enters full production (NVIDIA PR 31 May 2026; StorageReview 15 Aug 2026) - Aug 2026
neutral · claim Lumilens offers near-packaged and co-packaged optics for scale-up (GPU-to-GPU, the in-rack reach where copper still wins), but gives no availability dates or interface specs, and its POET engine supply ramps in 2027. Lumilens product roadmap: NPO then CPO for scale-up, no dates (StorageReview, company site) - Aug 2026
for · claim A two-year-old optics company says its 800G/1.6T scale-out transceivers are in production at one unnamed hyperscaler under a multi-billion-dollar, multi-year agreement, and raised $700M+ at $5.51B to build them. Lumilens emerges from stealth with $700M+ Series C at $5.51B; first scale-out product shipping to an unnamed hyperscaler (StorageReview, Pulse 2.0, Optica OPN, SDxCentral, DealStreetAsia) - Jul 2026
for · observable Optics strategics kept underwriting the transition in Q2 2026: nEye raised $80M Series C (Alphabet CapitalG, Microsoft M12) for single-chip optical circuit switches for AI fabrics; HyperLight raised $80M Series C led by MediaTek with UMC, Foxconn and Jabil to… Startup Funding: Q2 2026 (Semiconductor Engineering, Jesse Allen) - Jul 2026
against · observable Two venture-funded interconnect plays route around optics at scale-up reach: AttoTude ($52M Series C, Keysight strategic) and Point2 Technology (+$31.4M Series B, Nvidia NVentures) both transmit 800G-plus per lane as RF over plastic dielectric waveguide, explicitly marketed as beating copper… Startup Funding: Q2 2026 (Semiconductor Engineering, Jesse Allen) - Jun 2026
against · primary Mass production of co-packaged optics may slip to 2028-2029 on inconsistent yields, with NVIDIA's 800VDC architecture also delayed to 2028 — the CPO part of the optical timeline is slipping. CPO mass production may slip to 2028-2029 (DigiTimes) - Jun 2026
against · observable SemiAnalysis reported on June 9, 2026 that large-scale CPO commercialization would be delayed with full mass production pushed to 2028-2029, citing manufacturing yields and system integration complexity. In-Depth Review of the CPO Delay Controversy: SemiAnalysis Report - Jun 2026
against · primary SemiAnalysis reported large-scale CPO commercialization delayed to 2028–2029, with scale-up pushed to 2029 citing manufacturing yield challenges. SemiAnalysis: CPO delayed to 2028–2029 - Jun 2026
against · observable CPO faces a multi-port failure mode (one fault idles a cluster slice) and must hit <0.1 FIT before operators adopt — a real reliability gate slowing displacement. Where CPO stands in 2026 — reliability gate (EDN) - May 2026
for · observable CPO is additive rather than wholesale replacement for pluggables; late-2020s shows managed coexistence with balance shifting toward integration as CPO, LPO, and pluggable optics operate across different datacentre tiers. The Global Co-Packaged Optics Market 2026-2036 - May 2026
for · observable Optical-transceiver market projected ~$25-35B in 2026 with structural acceleration to 800G/1.6T at ~12-18% CAGR driven by AI hyperscaler capex. Optical transceiver market ~$25-35B 2026, 1.6T+LPO drive growth - Apr 2026
against · primary Copper remains the most practical scale-up interconnect for today's cluster sizes, with active copper cable demonstrations achieving 1.6T and 3.2T per-channel data rates at OFC 2026. OFC 2026: Semtech Advances the Future of AI Data Center Optical and Active Copper Interconnects - Apr 2026
against · primary Copper-based solutions such as direct attach cables (DACs) and active electrical cables (AECs) are expected to remain the preferred choice for intra-rack connectivity, with short-reach copper TAM exceeding $10 billion by 2029. Copper vs Optical in the AI Infrastructure Buildout - Apr 2026
for · claim TSMC integrating COUPE silicon-photonics into CoWoS with 2026 framed as the inflection for optical engines in HPC packaging. TSMC integrating COUPE into CoWoS (TrendForce) - Apr 2026
for · observable CPO will replace pluggable transceivers in scale-out within a few years and shift copper in scale-up networks as CPO reliability is shown to be better than copper, with NVIDIA planning CPO introduction for scale-up in 2027/28. All AI Data Center Interconnects Will Be Optical Within 5 Years - Mar 2026
for · primary Market for linear optical transceivers and CPO/NPO optics forecast to more than double from $5B in 2024 to over $10B in 2026 Semtech: 224G IC Family Launch for Linear Optics Era - Mar 2026
for · primary Broadcom announced production-volume shipments of Tomahawk 6 with co-packaged optics on March 12, 2026, delivering 102.4 Tbps with integrated optical engines. Broadcom Ships Tomahawk 6: World's First 102.4 Tbps Switch with Co-Packaged Optics - Mar 2026
for · primary AMD, Broadcom, Meta, Microsoft, NVIDIA, and OpenAI formed OCI MSA in March 2026 to establish optical scale-up interconnect standard, validating optical displacement thesis. Optical Scale-up Consortium Established for AI Infrastructure - Mar 2026
for · primary NVIDIA announced early 2026 availability for Quantum-X InfiniBand CPO switches and 2H 2026 for Spectrum-X Ethernet CPO switches on March 2, 2026. NVIDIA's $4B CPO Bet: Scale-Out First, Scale-Up Later - Mar 2026
for · observable LPO/CPO ports forecast to exceed ~30% of total 800G+1.6T ports deployed 2026-2028, with LPO cutting 800G module power to ~10W. Linear Pluggable Optics overview (IEEE EPS) - Mar 2026
for · primary Ethernet optical transceiver sales doubled in 2024 and increased 70% in 2025, with enough production capacity to double sales again in 2026, supporting the structural shift from copper to optical interconnects at successively shorter reaches. LightCounting :: $100 Billion Market for AI Cluster Optics by 2030? - Jan 2026
against · primary Vera Rubin NVL72 (CES 2026) doubles scale-up bandwidth to 260 TB/s while keeping a copper backplane via bidirectional SerDes — copper still wins the shortest in-rack reach. Vera Rubin NVL72 keeps a copper backplane (SemiAnalysis) - Mar 2025
for · primary NVIDIA launched Quantum-X (115.2 Tb/s, TSMC COUPE) and Spectrum-X CPO switches with 3.5x power efficiency and 4x fewer lasers; Spectrum-X targeted H2 2026 — optical moving into the switch at scale-out. NVIDIA announces Spectrum-X / Quantum-X CPO switches
What would move itthe measures watched
- watchCPO switch shipments / GA dates (NVIDIA Quantum-X, Spectrum-X; Broadcom Tomahawk). On-time GA and volume ramp = optical advancing at switch tier; slips to 2028+ weaken the timeline
- watch800G→1.6T optical transceiver market revenue & unit ramp. Accelerating 1.6T mix confirms optics scaling with AI clusters
- watchLPO (linear-drive) share of 800G/1.6T ports. Rising LPO share = optical advancing to shorter reaches at lower power; stalled = DSP-pluggable inertia
- watchScale-up (in-rack) interconnect medium in flagship systems. Copper backplane persisting in NVL72/Vera Rubin = copper still winning shortest reach; switch to optical = thesis advancing
- watchCPO yield / reliability (FIT rate, optical-engine attach yield). FIT <0.1 and >95% attach yield needed before operators adopt; below threshold = delay risk