Press Releases
Commercialization of the 4000-fiber SWR™ / WTC™ Lineup
Fujikura Ltd. (Director, President and CEO: Naoki Okada) has developed and commercialized a new 4000-fiber SWR™*1 / WTC™*2 for the Japanese data center market. The 4000-fiber SWR™ / WTC™ is a thin-diameter, high-density fiber optic cable (Wrapping Tube Cable™: WTC™) using Fujikura's proprietary technology, equipped with 16-fiber or 8-fiber intermittently bonded ribbon fibers (Spider Web Ribbon™: SWR™) that allow for mass fusion splicing, making it the fiber optic cable with the highest fiber count for domestic data centers.
The spread and expansion of generative AI and cloud services have led to a rapid increase in the volume of communication data and information traffic around data centers.
Fujikura has previously supplied 2000- and 3000-fiber optic cables to domestic data centers, but there was an urgent need to develop fiber optic cable with even higher fiber counts that can be installed in standard conduits.
Due to space constraints when laying fiber optic cable in underground conduits in Japan, the maximum outer diameter must be kept at 24 mm or less, but the 4000-fiber SWR™ / WTC™ has a maximum outer diameter of 23 mm and yet maintains the same mechanical and optical characteristics as a 3000-fiber cable. The Lineup also includes both 16-fiber SWR™ and 8-fiber SWR™ types, each capable of 16-fiber splicing and 8-fiber splicing. 16-fiber splicing reduces the number of fusion splices and the efficiency of fiber installation work in the termination frame, contributing to a reduction in total installation time.
In conjunction with sales launch of the 4000-fiber SWR™/ WTC™ we plan to add dedicated closures to our product lineup, making it possible to build communication networks using thin-diameter, high-density SWR™/ WTC™ while efficiently utilizing existing infrastructure networks.
Fujikura will continue to contribute to the construction of advanced communication networks through SWR™/ WTC™, while at the same time contributing to the realization of an even more advanced information society both domestically and internationally through the development of high-quality, innovative technologies and products.
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Comparison table between existing cables and 4000-fiber SWR™ /WTC™
*Spider Web Ribbon™ (SWR™) and Wrapping Tube Cable™ (WTC™) are trademarks of Fujikura Ltd.
*1 SWR™ (Spider Web Ribbon™)
An optical fiber ribbon developed using Fujikura’s proprietary technology. It features a structure in which single optical fibers are bonded intermittently, providing excellent flexibility. It allows for high-density implementation within fiber optic cables, contributing to thinner and higher-density fiber optic cables.
*2 WTC™ (Wrapping Tube Cable™)
Thin-diameter, high-density fiber optic cable developed by Fujikura using proprietary technology that implements SWR™. It is a simply structured fiber optic cable in which the optical fiber ribbons are covered with a tape wrapping. Compared to conventional fiber optic cables such as the slot structure mainly used domestically or the loose tube structure common overseas, it has a thinner and higher-density design, enabling the use of existing ducts and significantly shortening construction periods.
