WDM optical submarine network systems

This paper describes optical submarine network systems that support 160 Gb/ s capacity (10 Gb/s x 16 lambda) per fiber. These advanced systems enable p ractical and cost-effective deployment of networks with 4 fiber pair optica l submarine cables, and total capacity of 640 Gb/s. A typical network confi guration and the relevant equipment for such networks are outlined. The equ ipment includes submersible wide-band repeaters, optical ADM branching unit s and line terminal equipment, which we have developed making full use of o ur advanced optical technology. Our ultra-large capacity (10.7 Gb/s x 66 la mbda) transmission experiment, and enabling technologies for future Tera-bi t transmission systems are also summarized. New network configurations usin g OADM or Internet Protocol (IP) routers are proposed for next generation W DM submarine networks.