The Wall Street Journal reported on July 7, 2026 that Nokia, the Finnish company once synonymous with mobile phones, is staging a “new act”: supplying networking equipment to the AI data center buildout. The framing marks a strategic shift for a firm whose revenue has long depended on telecom operators, toward the hyperscale cloud and AI companies now driving the industry’s largest capital-spending wave.

Executive Summary

The story here is a repositioning, not a product launch. Nokia has spent the past two years assembling the pieces of a data center strategy: it closed its roughly $2.3 billion acquisition of optical-networking specialist Infinera in early 2025, installed Justin Hotard — previously head of Intel’s data center and AI business — as CEO in April 2025, and in late 2025 announced a partnership with Nvidia that included Nvidia taking an approximately $1 billion equity stake. The WSJ’s July 2026 feature treats these threads as a coherent identity change: legacy telecom vendor becomes AI-infrastructure supplier.

Why it matters: telecom-carrier capital spending — Nokia’s traditional market alongside rival Ericsson — has been stagnant for years, while spending on AI data centers has exploded. Every AI campus needs high-capacity switching inside the facility and optical links between facilities, and that is precisely the equipment Nokia now sells. Whether the pivot moves Nokia’s financial needle, however, is a claim the headline asserts more than the available material proves.

Why a Telecom Giant Is Chasing Data Centers

Nokia’s core customers — mobile and fixed-line network operators — buy equipment in cycles tied to generational upgrades like 5G, and that cycle has matured. Carriers worldwide have trimmed capital budgets, leaving suppliers fighting over a flat market. Data centers present the opposite picture: hyperscalers (the largest cloud and AI companies, such as the major U.S. cloud platforms) are committing historic sums to new AI capacity. For a networking vendor, following the capital is rational; the buildout needs exactly the routing, switching, and optical transport gear Nokia’s network-infrastructure division makes.

The strategic logic is also defensive. If AI workloads keep pulling investment away from traditional telecom networks, a supplier that stays carrier-only shrinks with its customers. Diversifying the customer base toward cloud and enterprise buyers reduces Nokia’s dependence on a concentrated, slow-growing set of operators.

The Infinera Bet and the Optical Opportunity

The most concrete evidence behind the “new act” narrative is the Infinera acquisition, completed in early 2025. Infinera builds optical transport systems — the technology that pushes enormous data volumes over fiber between sites — and counted cloud providers among its customers, something Nokia’s carrier-heavy optical business had less of. Data center interconnect, the fiber links that stitch AI campuses into distributed clusters, is one of the fastest-growing corners of optical networking, because AI training increasingly spans multiple buildings and even multiple regions.

Leadership reinforces the signal. Hiring a CEO from Intel’s data center and AI unit, rather than a telecom veteran, told the market where Nokia thinks its growth lives. The Nvidia partnership announced in late 2025 — spanning AI-powered radio networks and data center networking, with Nvidia’s equity stake attached — gave the strategy a marquee endorsement, though partnerships of that kind announce intent, not revenue.

A Crowded Field of Entrenched Rivals

The hard part is that data center networking has incumbents with deep roots. Ethernet switching inside AI facilities is dominated by established players such as Arista Networks and Cisco, with Nvidia itself selling networking gear alongside its chips, and merchant-silicon suppliers like Broadcom powering much of the market. Hyperscalers are demanding, technically sophisticated buyers who qualify vendors slowly and negotiate hard on price. Nokia is not starting from zero — it has long sold IP routing and optical gear — but winning share inside the AI cluster, as opposed to the links between facilities, means displacing suppliers the hyperscalers already trust.

That competitive reality is why the pivot should be judged by design wins and revenue mix over time, not by strategic announcements. A vendor can be genuinely present in the AI buildout while capturing only a modest slice of its economics.

Reinvention Is Nokia’s Oldest Habit — and Its Hardest Trick

Nokia has reinvented itself before: from a 19th-century paper and rubber business, to the world’s dominant handset maker, to a network-equipment company after selling its phone business to Microsoft in 2014 and absorbing Alcatel-Lucent in 2016. That history cuts both ways. It shows an organization capable of wholesale change, and it shows how brutal such transitions are — the handset collapse remains a business-school case study in losing a platform shift. The AI pivot asks Nokia to serve a customer type with different buying behavior, faster product cycles, and thinner tolerance for legacy overhead than the carriers it grew up with. The company’s ability to keep funding its telecom base while investing to hyperscaler speed is the execution question that will decide whether this act succeeds.

Background

Nokia, founded in Finland in 1865, has cycled through several corporate identities: industrial conglomerate, dominant mobile-phone maker, and — after selling its handset business to Microsoft in 2014 and acquiring Alcatel-Lucent in 2016 — a network-equipment supplier competing chiefly with Ericsson and Huawei for telecom-operator spending. That carrier market has stagnated as the 5G investment cycle matured, pressuring Nokia and its peers to find new growth.

The AI boom reshaped the equipment landscape: hyperscale cloud and AI companies became the industry’s biggest spenders, building data center campuses that consume vast amounts of networking gear. Nokia moved toward that demand with its Infinera optical acquisition (closed early 2025), the appointment of former Intel data center chief Justin Hotard as CEO (April 2025), and a late-2025 Nvidia partnership with an accompanying equity investment — the sequence of moves the WSJ’s July 2026 feature frames as the company’s “new act.”

Source: Nokia’s New Act: Supplying the AI Data Center Boom — Wall Street Journal feature on Nokia’s strategic shift from telecom-carrier equipment toward supplying the AI data center buildout, published July 7, 2026.

Researchers in China have reported a hollow-core optical fiber trial carrying 51.3 terabits per second over 128 miles (roughly 206 kilometers) without signal regeneration, according to a report published by Tom’s Hardware on June 28, 2026. The result is framed as a milestone targeting the networking bottlenecks created by the AI era’s explosive demand for data movement.

Executive Summary

The headline achievement combines three things that have historically been difficult to deliver at once in hollow-core fiber: very high aggregate capacity (51.3 Tb/s), meaningful terrestrial distance (128 miles), and the absence of signal regeneration — the electronic or optical boosting stations that long-haul links normally require. Hollow-core fiber guides light through an air-filled channel rather than solid glass, and its traditional weakness has been signal loss over distance. Demonstrating a multi-terabit link at this reach without regeneration attacks that weakness directly.

Why it matters: AI training and inference clusters are increasingly distributed across multiple data centers, and the links between those facilities are becoming a first-order design constraint alongside power and cooling. Hollow-core fiber promises both lower latency — light travels faster through air than through glass — and headroom for higher optical power, which together address exactly the bottleneck the report cites. A credible long-distance, high-capacity trial from China also signals that the hollow-core race is now genuinely global, not a Western-led curiosity.

Why Hollow-Core Fiber Is Suddenly Strategic

Conventional optical fiber sends light through a solid glass core. That works remarkably well, but it imposes two physical taxes. First, light moves about a third slower through glass than through air, which adds latency on every mile of a route. Second, intense light interacting with glass produces nonlinear distortions that cap how much optical power — and ultimately how much data — a single fiber can carry. Hollow-core fiber replaces the glass core with a precisely engineered air channel, so light travels faster and interacts far less with the material around it. For latency-sensitive users (financial trading was the earliest adopter) and for operators trying to push more terabits through existing conduit, those properties are directly monetizable.

The AI buildout has sharpened the case. Training runs increasingly span multiple data centers because no single site can secure enough power, and inference traffic is pushing metro and regional networks harder. When facilities tens or hundreds of miles apart must behave like one computer, every microsecond of round-trip time and every terabit of cross-site bandwidth counts. That is the ‘AI-era networking bottleneck’ this trial is aimed at, and it is the same logic that has driven hyperscaler interest in the technology in the West.

What 51.3 Tb/s Over 128 Miles Actually Demonstrates

The historically fatal flaw of hollow-core fiber was attenuation: early designs lost signal so quickly that links of even a few miles were impractical. Recent generations of antiresonant designs have brought loss down toward — and by some published accounts below — that of conventional fiber, but most headline demonstrations have involved either short distances, modest capacities, or laboratory spools rather than realistic spans. A 128-mile unregenerated link at 51.3 Tb/s, if borne out in the technical details, would indicate loss and signal-quality performance good enough for real regional routes, such as links between data center campuses or metro areas, without intermediate amplification stops.

The caveats matter, though. A trial is not a product. The report, as circulated, does not detail whether the fiber was deployed in field conditions or tested on spooled fiber in a controlled setting, what error rates were achieved, or how many wavelength channels produced the aggregate figure. These distinctions separate a genuine deployment milestone from a strong laboratory result, and the source material does not settle them. Both readings are consistent with what has been reported.

A Global Race, Not a Western One

Hollow-core fiber development has been most visibly associated with Western efforts — notably UK-rooted research that led to commercial deployments by a major US hyperscaler in its own network. A prominent Chinese result at this scale confirms that the technology is now a field of international competition, with implications beyond engineering. Optical fiber and the components around it (amplifiers, transceivers, cabling) are strategic supply-chain items, and nations building sovereign AI infrastructure have every incentive to develop domestic capability in next-generation transmission. For the broader market, competition tends to accelerate maturation and push down costs; for individual vendors, it compresses the window in which early leadership can be converted into commercial advantage.

The Road From Trial to Deployed Network

Even accepting the result at face value, several hard steps stand between a record trial and hollow-core fiber as routine infrastructure. Manufacturing hollow-core fiber at volume, with consistent quality and at a cost that competes with mass-produced conventional fiber, remains an industry-wide challenge. Field practicalities — splicing, connecting hollow-core to conventional fiber at network boundaries, cabling that protects the delicate microstructure, and keeping moisture and contaminants out of the air core — all add cost and complexity that trials rarely capture. Operators will also weigh whether the latency and capacity gains justify overbuilding routes that already have serviceable conventional fiber. The most likely early market is exactly where this trial points: new, high-value routes between AI data centers, where latency and bandwidth translate directly into compute efficiency and where builders are already spending at unprecedented levels.

Background

Hollow-core fiber has been researched for decades, but for most of that history its high signal loss confined it to niche, short-distance uses. A wave of design breakthroughs in the 2010s and 2020s — particularly antiresonant fibers that guide light in an air core surrounded by carefully arranged glass membranes — cut attenuation to levels approaching, and by some published accounts surpassing, conventional fiber. That progress turned commercial: Microsoft acquired hollow-core specialist Lumenisity in 2022 and has since deployed the fiber in parts of its own network, citing latency and capacity benefits for cloud and AI workloads.

The demand backdrop is the AI infrastructure buildout. As training clusters outgrow single facilities and inference traffic scales, data-center interconnect — the high-capacity links between sites — has become a critical constraint alongside power and cooling. That is the market context in which a 51.3 Tb/s, 128-mile unregenerated hollow-core trial, reported from China in June 2026, lands as more than a laboratory curiosity.

Source: China’s hollow-core fiber trial pushes 51.3 Tb/s over 128 miles without signal regeneration — milestone targets AI-era networking bottlenecks — Tom’s Hardware report, June 28, 2026, on a Chinese hollow-core optical fiber transmission trial.