AI Networking and Optics: NVLink, Ethernet, CPO — 2026-09-08

Top developments

Broadcom’s AI Networking Revenue Hits $16.7B, Guidance Signals Long-Term Growth

In its fiscal Q3 2026 earnings released around September 2, Broadcom reported AI semiconductor revenue surged 221% year-over-year to $16.7 billion, driven by strong demand for custom AI accelerators (XPUs) and AI networking components including Ethernet switches and optical DSPs. Management raised its long-term outlook, projecting AI semiconductor revenue to reach approximately $115 billion in fiscal year 2027 (ending October 2027) and substantially higher growth through 2028. This data validates the shift toward Ethernet-based scale-out fabrics for hyperscalers seeking alternatives to proprietary interconnects, with Broadcom’s Tomahawk and Jericho families serving as key enablers for these high-bandwidth clusters.

Nvidia Rebrands as "AI Infrastructure Platform" to Own Full Stack

Nvidia CEO Jensen Huang emphasized in recent communications that the company is no longer just a chip vendor but a "full-stack AI factory platform," a strategic positioning that integrates compute, networking (NVLink Fusion, InfiniBand, Spectrum-X), and software. This approach aims to capture more value from hyperscaler spending by bundling NVSwitch-based scale-up networks with Spectrum-X Ethernet for scale-out, effectively creating a closed-loop ecosystem that competes directly with Broadcom’s open Ethernet standards. The move underscores the intensifying battle for control over the AI cluster architecture, where networking is becoming as critical as the GPU itself.

Optical Transceiver Makers Report Record Profits on 1.6T Ramp

Chinese optical module giants Innolight (Zhongji InnoLight) and Eoptolink have reported robust first-half 2026 results, with combined profits hitting significant highs as they ramp up shipments of 800G and early 1.6T transceivers. Innolight explicitly noted that 1.6T shipments grew quarter-over-quarter, driving gross margin improvements, while Eoptolink benefited from high-margin 1.6T product mix shifts. These figures confirm that the transition to 1.6T optics is underway, driven by the deployment of next-generation AI clusters requiring higher bandwidth density and lower power consumption per bit.

Local view

Chinese Financial Media (Sina Finance & Investing.com CN): Local analysts are highlighting the "performance realization" phase for optical communication stocks. Reports emphasize that while the hype cycle has peaked, actual earnings from companies like Zhongji InnoLight and Tianfu Communication are validating the demand, with orders locked in through 2027. There is a growing focus on the supply chain shift from simple module assembly to higher-value upstream components like silicon photonics chips and CPO (Co-Packaged Optics) engines, with domestic substitution in laser chips accelerating.

Context & numbers

• Broadcom AI Revenue: $16.7 billion in Q3 FY2026 (+221% YoY).
• Broadcom FY2027 Forecast: ~$115 billion in AI chip revenue.
• Optical Market: 1.6T transceiver shipments are projected to ramp significantly in H2 2026, with sales expected to exceed $2 billion this year according to earlier LightCounting forecasts cited in local reports (Note: This specific dollar figure is from a March article but referenced in the context of current H1 2026 earnings validation).
• Nvidia Share: Nvidia's share of the Ethernet switch market for AI has grown rapidly, challenging traditional players like Arista.

On the radar

• Broadcom Q4 Guidance Reaction: Investors are closely watching how the market digests Broadcom's "soft" near-term guidance versus its aggressive long-term AI targets; the stock dipped 6% post-earnings despite the revenue surge.
• 1.6T Volume Ramp: Expect further confirmation of volume production for 1.6T OSFP224 modules from major vendors in upcoming investor calls, as hyperscalers begin deploying GB300-class systems that require this bandwidth tier.
• CPO Adoption Timelines: Watch for specific deployment dates for Nvidia’s Spectrum-X Photonics switches, which are slated for 2026 availability, potentially disrupting the pluggable transceiver market model.