---
title: "Multi-Core Fiber"
description: "1 posts about Multi-Core Fiber, summarised, each linking to the original."
---

# Multi-Core Fiber
> 1 posts about Multi-Core Fiber, summarised, each linking to the original.

## Articles

### [Inside Petal: Building the World’s First Petabit-Class Transoceanic Subsea Cable](https://yomu.fyi/post/inside-petal-building-the-world-s-first-petabit-class-transoceanic-sub.md)
- Company: [Meta](https://yomu.fyi/company/meta.md)
- Author: By Elizabeth Rivera Hartling, Pascal Pecci, Matthew Mitchell
- Published: Sep 21, 2026
- Type: Announcement

Meta announced Petal, the first transoceanic subsea cable to deliver petabit capacity, connecting France and the United States over 7,000 km and expected to enter service in 2029. It will be the first subsea cable system to deploy multi-core fiber technology at scale, using 2-core fiber in a 24 fiber-pair system to achieve 1 Pbps. The cable overcomes the Shannon Limit by adopting spatial division multiplexing with multi-core fiber, requiring ultra-pure synthetic silica for low attenuation and counter-propagation to minimize crosstalk. Petal’s repeaters use a single-body 96 amp design with a Fan-In/Fan-Out interface to transition between 2-core and single-core fiber for amplification, staying within existing 18 kV power feeding limits. Built with NEC, Sumitomo Electric, and Orange, Petal represents the largest generational capacity increase of any repeatered subsea system.