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Microsoft Azure has partnered with Corning and Heraeus to scale hollow core fiber (HCF) production, aiming to enhance fiber technology for improved speed, bandwidth, and power efficiency. The initiative includes plans to expand Azure's HCF network by 15,000 km within 24 months, following successful tests that demonstrated a record low transmission loss and a significant reduction in latency. Despite its advancements, HCF technology faces challenges in handling and compatibility, prompting industry efforts to standardize testing methods.