AI Boom Sparks Optical Fiber Gold Rush in China

While the world's attention is fixed on geopolitical maneuvers between Beijing, Moscow, and Washington, a quieter but equally transformative story is unfolding in China's industrial heartland: a boom in optical fiber demand fueled by the insatiable appetite of artificial intelligence data centers.

According to a CNBC report for China's CCTV on May 19, 2026, global demand for optical fiber is surging due to the construction boom in AI data centers. Orders at major Chinese optical fiber manufacturers have already been booked through early 2027. Industry leaders Hengtong and FiberHome told the media that their production lines are currently operating at full capacity, and delivery cycles for some products have extended from just a few weeks in the past to several months.

Data from CRU Group shows that in 2024, data centers accounted for less than 5% of global optical fiber demand. But as demand continues to surge, that share is expected to rise to 30% by 2027. The reason is simple: AI training and inference require tens of thousands of chips to work together, driving data transmission density far higher than in traditional cloud computing centers. Some industry insiders estimate that AI data centers require around 36 times more optical fiber than traditional CPU server racks.

However, optical fiber production cannot be expanded overnight. The current bottleneck is mainly concentrated upstream in optical fiber preforms—the glass rods used to draw optical fiber. Analysts point out that manufacturing preforms requires extremely advanced production technology, and adding new capacity typically takes between one and a half to two years. As a result, even if downstream cable manufacturers accelerate production, they may still be constrained in the short term by limited upstream material supply.

Since the beginning of this year, several major U.S. technology companies have started positioning themselves in the optical fiber sector by locking in production capacity through multi-year supply agreements. In January, Meta announced a multi-year supply agreement worth as much as hundreds of millions of dollars.

The optical fiber boom highlights a critical shift in the AI supply chain: beyond GPUs and memory, connectivity infrastructure is becoming a bottleneck. China, as the world's largest optical fiber producer, stands to benefit immensely. But the tight supply also reveals vulnerabilities. With western tech giants snapping up capacity, Chinese manufacturers must balance domestic demand with lucrative export contracts.

From an investor perspective, the optical fiber sector offers a compelling opportunity. Companies like Hengtong and FiberHome are likely to see revenue and margin expansion as pricing power shifts to suppliers. However, the long lead times for preform capacity additions mean that the supply crunch could persist for years, potentially capping growth. For now, the race is on to secure fiber—and China holds the keys to the glass.

Sources: CNBC – Putin, Russia visit China and CNBC – CCTV Script May 19, 2026.

1. AI data centers are driving a massive surge in optical fiber demand, with Chinese manufacturers booked through 2027.
2. Supply constraints are concentrated in optical fiber preforms, which require 1.5–2 years to add capacity.
3. U.S. tech giants like Meta are locking in capacity via multi-year deals, intensifying competition for supply.
4. China's dominant position in optical fiber production offers both opportunities and risks amid global AI infrastructure buildout.