NEC：四重海底光缆通信：几年后实际使用
-新型海底光缆研制成功-
NEC：
相同大小的通信区域最多可增加 4 倍。
我们成功开发了一条新的海底电缆。
这是世界上第一项技术，我们的目标是在几年内将其投入实际应用。
新海底光缆：
按照惯例，
在直径为 1/8 毫米的玻璃丝中，
用于交换信息的光传输线，
我只有一个。
这一次，我们将其增加到四个。
海底电缆：
地球30圈，120万公里，分布在太平洋和其他地区。
日益增长的国际通信需求：
5G高速大容量通信普及
当它以每年 30% 到 40% 的速度增长时，
这是预期的。
脸书、谷歌等：
一家大型美国 IT 公司正着手进行巨额投资以确保其自身安全。
此外，中国还通过安装电缆来增加其存在。
IT / 网络 | NHK 新闻
https://www3.nhk.or.jp/news/html/20211004/k10013289561000.html
NEC, OCC and Sumitomo Electric complete trial of subsea cable with multicore fiber:
Tokyo, October 4, 2021,
NEC Corporation
its subsidiary OCC Corporation Sumitomo Electric Industries, Ltd.announced today that they have completed the first trial of uncoupled (*1) 4-core submarine fiber cable (*2),
and verified its transmission performance to meet the exacting demands of global telecommunications networks.
International data usage
is expected to expand by 30-40% CAGR from 2020-2026 (*3), driven by factors such as the growth of 5G mobile data, and the need to share ever more content between data centers distributed around the world.To meet this demand,
submarine networks are adopting space division multiplexing (SDM) technology, where the number of independent spatial channels is increased to maximize total system capacity, reduce power consumption and optimize cost per bit.Multicore fiber
is now expected to further increase the number of parallel optical fiber cores without increasing the submarine cable size and structure, enabling the second generation of submarine SDM systems.Press Releases | NEC