Submarine Fiber Cable
Submarine (Undersea) Optical Fibre Cable, also known as submarine communication cable, is a wire wrapped with insulating material and laid on the seabed to establish telecommunications transmission between countries.
The submarine optical cable system is mainly used to connect the optical cable and the Internet. It is divided into two parts: onshore equipment and underwater equipment. The submarine optical cable is the most important and most vulnerable part of the underwater equipment.
The submarine optical cable is laid on the seabed with a wire bundle wrapped in an insulating sheath. The seawater can prevent the interference of external light and magnetic waves, so the signal-to-noise ratio of the submarine cable is high; there is no time delay in the communication of the submarine optical cable. The design life of submarine optical cables is 25 years of continuous operation, while artificial satellites generally run out of fuel within 10 to 15 years.
The basic structure of the submarine optical cable is: polyethylene layer, polyester resin or asphalt layer, steel strand layer, aluminum waterproof layer, polycarbonate layer, copper or aluminum tube, paraffin, alkane layer, optical fiber bundle, etc.
According to different marine environment and water depth
It can be divided into deep-sea optical cables and shallow-sea optical cables. Correspondingly, the optical cable structure is represented by a single-layer armor layer and a double-layer armor layer. In the product model representation method, DK is used for single-layer armor, and SK is used for double-layer armor. The specifications are expressed by the number and type of fibers.
According to the role and function can be divided into
Submarine communication cable and submarine optical power cable. The former is mainly used for communication services, and the latter is mainly used for underwater transmission of high-power light energy.
The submarine optical cable system is mainly used to connect optical cables and the Internet. It is divided into two parts: onshore equipment and underwater equipment. The onshore equipment packs and transmits communication services such as voice, image, and data. The underwater equipment is responsible for the processing, sending and receiving of communication signals. Underwater equipment is divided into three parts: submarine optical cable, repeater and "branch unit": the submarine optical cable is the most important and most vulnerable part.
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