Hollow-Core Fiber Routes Light Through Vacuum, Cutting Data Center Latency 30%

Relativity Networks' fiber transmits light through a near-vacuum core instead of solid glass, cutting signal latency roughly 30% — 3.5 microseconds per kilometer versus five in standard fiber. In AI training clusters, where GPU round-trip delays limit utilization, that gap compounds across thousands of parallel links. An unnamed hyperscaler placed a $40 million follow-on order; the company raised $22 million in SAFE funding on August 18, 2026.