The substitute intelligence (AI) playbook is acquainted by now: Construct a much bigger GPU cluster. Add extra Blackwell chips. Throw extra electrical energy on the drawback. If the chips get scorching, construct the information middle subsequent to a river. If the bandwidth runs out, lay extra copper.
That’s how Amazon, Alphabet, Microsoft, and Meta Platforms are fixing AI in 2026. And it really works — till it runs into physics.
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One firm checked out that very same drawback and arrived at a distinct reply. GlobalFoundries(NASDAQ: GFS) is betting that the true bottleneck in AI infrastructure isn’t compute energy. It’s the wire connecting the chips and changing that wire with gentle.
The copper wall no one talks about
Inside each AI knowledge middle, 1000’s of chips should share data at monumental speeds. Proper now, most of that communication travels by copper, which is operating out of room. It generates warmth, loses sign over distance, and consumes energy in ways in which turn out to be painful at scale. Each time an AI mannequin will get greater, the copper drawback will get worse.
The trade has recognized this for years. The answer has a reputation: co-packaged optics (CPO). The concept is to maneuver optical transceivers, elements that transmit knowledge by gentle somewhat than electrical energy, instantly alongside the chip, shrinking the space knowledge has to journey by copper to virtually nothing. The result’s quicker, cooler, extra power-efficient AI infrastructure.
In Could 2026, GlobalFoundries introduced SCALE — Silicon photonics Co-packaged Superior Mild Engine answer — the trade’s first platform to satisfy the Optical Compute Interconnect Multi-Supply Settlement specs for AI scale-up architectures. The platform makes use of each coarse and dense wavelength-division multiplexing (DWDM) over every optical fiber to push bandwidth density and scalability previous what copper can do, and GlobalFoundries has already demonstrated 8λ and 16λ bi-directional DWDM natively on its platform — a milestone the corporate describes as elementary to the whole lot that follows.
Picture supply: Getty Photographs.
The a part of the stack everyone seems to be chasing
Here is the factor about silicon photonics that will get misplaced within the GPU protection: It’s a manufacturing drawback as a lot as a physics drawback. Designing a silicon photonic chip is difficult. Constructing it at scale, with the precision required for optical fiber alignment, in quantity, for hyperscale knowledge facilities is more durable.
GlobalFoundries has spent years growing the method know-how to do precisely that. Its silicon photonics platform helps 50 Gbps and 100 Gbps micro-ring modulators, broadband removable fiber interfaces, and flat insertion loss traits that future-proof the platform as wavelength counts scale. In November 2025, the corporate acquired Superior Micro Foundry in Singapore, a specialised silicon photonics producer, including manufacturing property, mental property, and engineering depth that will take years to construct from scratch.
That acquisition gave GlobalFoundries manufacturing capability for silicon photonics in Singapore, a geography that issues for provide chain diversification amid elevated U.S.-China semiconductor tensions. The corporate is constructing a platform that the hyperscalers want and only a few producers can truly ship.
GlobalFoundries dropped 10% in at some point, however I am not nervous
GlobalFoundries fell practically 10% on Could 27, dragged down by Mubadala’s alleged inventory sale. Mubadala is Abu Dhabi’s sovereign wealth fund and was previously the controlling shareholder of GlobalFoundries. Regardless of the inventory drop, the long-term Motley Idiot framing wins right here.
GlobalFoundries’ story is unbroken. The SCALE announcement despatched the replenish 12% in a single session simply weeks in the past. A Q1 2026 earnings beat adopted. Silicon photonics income is predicted to almost double once more in 2026, with over 500 design wins logged in 2025 and momentum constructing. A sell-off doesn’t change these info.
Additionally, the U.S. authorities is backing GlobalFoundries with a proposed $375 million award to assist construct out home quantum manufacturing infrastructure.
Each main hyperscaler is asking the way to prepare greater fashions quicker. GlobalFoundries is asking a distinct query: How do you progress knowledge between chips with out the infrastructure melting?
Co-packaged optics is the reply. The corporate constructing the manufacturing platform to ship it at scale remains to be, on most days, filed below “semiconductor foundry.” On days it drops 10% for causes unrelated to its most necessary enterprise, that drop turns into a possibility.
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Micah Zimmerman has no place in any of the shares talked about. The Motley Idiot has positions in and recommends Alphabet, Amazon, GlobalFoundries, Meta Platforms, and Microsoft. The Motley Idiot has a disclosure coverage.
