Limits RegistryPUBLIC RECORD
Limits RegistryJapan's National Institute of Information and Communications Technology (NICT), with Eindhoven University of Technology and the University of L'Aquila, demonstrated 22.9 Pbit/s in a single fiber, announced November 30, 2023 (presented at ECOC 2023). A separate, differently-scoped record exists for capacity over long-haul distance (1.02 Pbit/s over 1,808 km using standard-cladding-diameter fiber, May 2025) — the two figures measure different things and shouldn't be conflated.
The question, scope, and sources behind this Registry record.
Japan's National Institute of Information and Communications Technology (NICT), with Eindhoven University of Technology and the University of L'Aquila, demonstrated 22.9 Pbit/s in a single fiber, announced November 30, 2023 (presented at ECOC 2023). A separate, differently-scoped record exists for capacity over long-haul distance (1.02 Pbit/s over 1,808 km using standard-cladding-diameter fiber, May 2025) — the two figures measure different things and shouldn't be conflated.
The highest raw data-transmission capacity demonstrated in a single strand of optical fiber under controlled experimental conditions.
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Current frontiers derived from accepted Claims.
An observed or demonstrated result; no opposing bound is implied.
The frontier is not sacred
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The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.
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Limits Registry. LR-FIBER-THROUGHPUT. Highest single-fiber data transmission capacity. 2026.