Facility
Sumitomo Electric – Yokohama Works (Kanagawa)
Operated by Sumitomo Electric →JP · Kanagawa Prefecture
Mass production preform and fiber drawing plant; primary Sumitomo Electric optical fiber facility completed 1994. Kanagawa Prefecture, near Tokyo. Produces VAD preforms via process co-invented in 1977. Sumitomo has achieved world-record ultra-low-loss fiber at this facility (0.1397 dB/km, OFC 2024); also manufactured world's first mass-produced ultra-low-loss multi-core fiber (September 2023). Primary supply point for Sumitomo's global fiber customers.
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Inputs produced
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Goods downstream
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Incidents on record
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Stories
What's produced here
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