Common measures for lightning protection of fiber optic cables are.
Use of metal clad fiber optic cables. Fiber optics are wrapped in metal rods or mesh foils, which can be used to carry and direct current.
Installation of lightning-proof insulation on the outside of the fiber optic cable. Using an insulator material such as polyethylene to cover the metal layer increases the shock capacity and prevents shock damage to the optical fibers inside the cable.
Installation of ground wires. By installing ground wires or joint ground wires at both ends of the fiber optic cable, the lightning current can be routed to the ground instead of passing through the interior of the cable.
Use of lightning protection connectors. The use of specially designed lightning protection connectors at both ends of the fiber optic cable enhances lightning protection and protects the cable from damage in the event of a lightning strike.
Installation of lightning protection devices. Installation of lightning rods or lightning conductors in the middle of the cable laying route can guide part of the lightning current through and bypass the cable body.
Isolation of fiber optic cable laying. Try to keep a distance from the overhead lines, not with other unprotected wires in the same band.
Buried cable depth is moderate. Generally between 0.8-1.2 meters can take into account the performance of lightning protection and future maintenance.
The above methods can be used individually or in combination, from the material to the means of deployment can effectively enhance the level of lightning protection of fiber optic cables.
