Observed Signal · Mar 9, 2026 · Technical Analysis · Source: Chipstrat · Impact: 3/5 · Sentiment: Positive
Co‑Packaged Optics (CPO) Primer
The article explains co‑packaged optics (CPO), a datacenter trend that integrates the optical engine onto or into the switch package to eliminate long copper traces between switch ASICs and transceivers. By moving modulation to silicon photonics and using external continuous‑wave (CW) lasers, CPO reduces the need for DSPs and high‑power SerDes, cutting power and potentially improving reliability and latency. The piece contrasts CPO with pluggable transceivers and intermediate approaches (near‑package optics), highlights manufacturing and serviceability tradeoffs, and notes industry momentum — Nvidia plans CPO shipments in 2026, Broadcom and Marvell are active in early programs, and value is shifting toward silicon photonics, CW laser supply, and advanced packaging while reducing demand for pluggable DSP modules.
CPO represents a meaningful infrastructure trend that reduces datacenter power and shifts semiconductor and optical value chains toward silicon photonics and CW laser supply; it affects hyperscalers, switch vendors and optical component suppliers, though adoption is gradual and constrained by packaging and serviceability tradeoffs.
Track Marvell Signals & Market Shifts in Real-Time
Polaris7 autonomous intelligence agents track regulatory filings, primary sources, executive changes, and deal flow 24/7. Create your free Explorer workspace to monitor these entities.
Key Takeaways & Evidence Grounding
- Co‑packaged optics (CPO) places the optical engine on or into the switch package, greatly shortening electrical paths.
- Shorter electrical paths remove the need for heavy DSP compensation and reduce SerDes power; Nvidia cites an example drop from ~30W (pluggables) to ~9W (CPO).
- CPO architectures use silicon photonics for high‑speed modulation and external continuous‑wave (CW) lasers as light sources.
- Nvidia plans to ship CPO products in 2026; Broadcom is shipping early‑access CPO switches and Marvell acquired Celestial AI to enter the space.
- CPO shifts value away from pluggable transceiver assembly and DSP vendors toward silicon photonics, CW laser production, and advanced packaging, though manufacturing and flexibility tradeoffs remain.
Connected Companies & Entities
4 Entities mappedOntology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
Co‑Packaged Optics (CPO) Arrives for Datacenter Interconnect
SemiAnalysis presents an in‑depth technical and commercial analysis of co‑packaged optics (CPO) for datacenter networking, arguing CPO will be commercially relevant starting in 2025 and will be the primary scaling path for scale‑up AI interconnects later this decade. The report compares CPO to pluggable transceivers and co‑packaged copper, quantifies power and TCO tradeoffs (including published Meta and SemiAnalysis estimates showing big per‑800G power reductions), and reviews product roadmaps and early deployments from Nvidia and Broadcom. It examines critical enabling technologies and supply‑chain elements (optical engines, modulators, laser sources, fiber attach units, TSMC COUPE packaging), reliability and serviceability concerns, and vendor strategies. The piece concludes scale‑up networking is the “killer” CPO use case, while scale‑out adoption will initially be limited until manufacturing, standards, and field reliability mature.
Coherent Ramps 6-inch InP for Vertical Photonics Stack
Coherent (formerly II‑VI) is pursuing a vertical-integration strategy across the photonics value chain, designing and manufacturing InP-based EMLs and CW lasers, VCSELs, silicon photonics, detectors and finished transceiver modules in-house while outsourcing DSPs. The company began production on a 6‑inch indium phosphide (InP) production platform (Sherman, TX and Järfälla, Sweden) in August 2025 and is ramping additional 6‑inch lines (including Zürich). Management reports higher yields and throughput on 6‑inch vs legacy 3‑inch lines and says datacenter & communications account for ~72% of revenue (Q2 FY2026). Coherent ships 800G/1.6T OSFP modules, demonstrated multi‑DSP 1.6T transceivers, and started revenue shipments of liquid‑crystal optical circuit switches (OCS) in Q4 FY2025. The company has a $2B equity investment and a multibillion‑dollar supply agreement with Nvidia and has run significant stock appreciation over the past 15 months.
VCSELs and the 200G-per-Lane Wall in AI Datacenters
This technical analysis (May 6, 2026) explains why VCSELs (vertical-cavity surface-emitting lasers) have dominated short-reach datacenter optics for decades and why the industry's move from 100G to 200G per lane is creating supply-chain and technical challenges. Coherent said it recently demonstrated three different 1.6T transceiver implementations—silicon photonics (SiPh), EMLs, and VCSELs—signaling platform hedging as hyperscalers push from 800G to 1.6T (with 3.2T on the horizon). The article traces VCSEL history (Honeywell research in 1993; first commercial product 1996), the acquisition chain through Finisar and II‑VI/Coherent, and highlights VCSELs' mature, high-volume supply chain driven by consumer uses (e.g., smartphone dot projectors). The piece frames the 200G-per-lane jump as an inflection that could break VCSEL's short-reach advantage and reshape optical interconnect market dynamics.
Track Real-Time Market Signals & Shifts
Set up custom watchlists to receive automated, evidence-grounded executive digests whenever material signals or shifts occur across your tracked landscape.