Fiber Prices Surge 100%+ on AI Demand

🔑 Enhanced Key Takeaways

• •The surge is exacerbated by a significant supply-side constraint: the global shortage of high-purity synthetic silica glass, a critical raw material for fiber preforms, which has seen production bottlenecks since late 2025.
• •Major Chinese fiber manufacturers are shifting production capacity away from low-margin 'Fiber-to-the-Home' (FTTH) cables toward high-margin, specialized multi-core and hollow-core fibers required for AI-driven GPU-to-GPU interconnects.
• •The price volatility has triggered a shift in procurement strategies among major Chinese telcos, moving from annual centralized bidding to quarterly or spot-market pricing models to mitigate supplier risk and ensure supply continuity.

🛠️ Technical Deep Dive

• •G.652.D Fiber: Standard single-mode fiber optimized for low water peak, now facing extreme demand for high-density data center backbone cabling.
• •Multi-core Fiber (MCF): Emerging as the primary solution for AI clusters to increase spatial multiplexing density, allowing for 5-10x higher bandwidth per square millimeter of cable cross-section.
• •Hollow-Core Fiber (HCF): Increasingly specified in ultra-low latency AI training clusters to reduce signal propagation delay by approximately 30% compared to traditional solid-core silica fibers.
• •Preform Manufacturing: The bottleneck lies in the Modified Chemical Vapor Deposition (MCVD) and Plasma Chemical Vapor Deposition (PCVD) processes, which are currently operating at maximum capacity globally.

🔮 Future ImplicationsAI analysis grounded in cited sources

⏳ Timeline