What is a submarine cable?

Submarine cables are cables wrapped in insulating materials that are laid on the seabed for telecommunications transmission.   Submarine cables are divided into submarine communication cables and submarine power cables. Modern submarine cables use optical fibers as materials to transmit telephone and Internet signals.   Submarine cables are divided into submarine communication cables and submarine power cables. Submarine communication cables are mainly used for communication services, which are expensive but highly confidential.   Submarine power cables are mainly used for underwater transmission of high-power electric energy, and have the same function as underground power cables, except for different application occasions and laying methods.

Fabrication materials for submarine cables

The core of submarine optical cables is made of high-purity fibers as thin as hair, which guide light along the path of the fiber through internal reflection.   Submarine cables must be able to withstand the enormous pressure of 8 kilometers underwater, which is equivalent to the weight borne by placing an elephant on a person's thumb.   The deep-sea cable manufactured by NEC is made of lightweight polyethylene, and the entire cable is only 17 millimeters thick.

Capacity of submarine cables

The submarine cable can carry up to 80Tbps of data, which is equivalent to transmitting 4.7GB of capacity in one second.

Product Use of Submarine Cables

Submarine communication cables are mainly used in long-distance communication networks, often used between remote islands, cross sea military facilities, and other important occasions.  The laying distance of submarine power cables is much shorter than that of communication cables, and they are mainly used between land islands, across rivers or harbors.  Connecting drilling platforms from land or interconnecting drilling platforms, etc. In general, using submarine cables to transmit electric energy is undoubtedly more expensive than using overhead cables of the same length,  However, using it is often more economical than using small and isolated power stations for regional power generation, and its application in offshore areas has more benefits. In countries with many islands and rivers,  This type of cable is widely used.