Meta Announced Petal Subsea Cable System
The 4,300-mile link between the U.S. and France is designed to scale data movement for AI workloads.
Updated on Oct. 3, 2026 in Data Centers
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Meta has announced the development of the Petal subsea cable system, a 4,300-mile infrastructure project connecting the U.S. and France. This initiative represents the latest expansion of the company's subsea network, which currently spans over 20 global projects.
Why it matters
As Meta scales its AI products like the Muse agent, building dedicated subsea infrastructure is essential to move massive volumes of data between global data centers. The investment underscores the massive capital commitment required to sustain these interconnected AI ecosystems.
The Petal system utilizes two-core fiber technology, which allows two distinct light paths to exist within each individual strand. This design aims to achieve a data capacity of 1 petabit per second across the 4,300-mile link.
The players
Meta
A global technology company that builds social media platforms and AI agents, backed by a $1.85 trillion valuation.
NEC
A multinational information technology and electronics corporation specializing in subsea cable systems.
Sumitomo Electric Industries
An engineering and manufacturing firm providing advanced fiber optic components for undersea telecommunications.
Orange
A multinational telecommunications operator providing regional network infrastructure for international data transmission.
The details
The Petal system achieves increased throughput by utilizing two-core fiber cables, a design that incorporates two separate optical paths inside a single fiber strand to maximize data density. Meta is partnering with specialized firms including NEC, Sumitomo Electric Industries, and Orange to execute the installation. These undersea cables form the physical backhaul, or the foundational network layer, that links regional data centers to facilitate high-speed, low-latency AI processing.
Timeline
The MAREA cable project was completed in 2017.
Project Waterworth was announced in February 2025.
Meta reported $72.2 billion in capital expenditures for 2025.
The Muse AI agent was launched on Sept. 8, 2026.
Meta announced the Petal subsea cable on Sept. 21, 2026.
The Tech Race
The Petal announcement follows the strategy established by the 2Africa cable system to expand network capacity globally. This move extends a trend of infrastructure investment that also includes the 31,000-mile Project Waterworth, which is estimated to cost over $10 billion.
This project scales the back-end infrastructure required to deliver AI-powered services like the Muse agent globally. While the cable is not a consumer-facing product, its completion is necessary to reduce latency and increase bandwidth for users accessing Meta's high-demand services.
The takeaway
Meta's aggressive capital spending reflects a strategic pivot toward owning the physical hardware that powers AI, moving beyond purely software-based services. Readers should watch the company's 2026 capital expenditure reports, as the projected spend of $145 billion will dictate the pace of future deployments.
What happens next
The Petal subsea cable system is expected to enter service in 2029.
Further reading
For more on how global network capacity supports modern compute infrastructure, read our Data Centers coverage.
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