The screening effects of the buried shield wires

When lightning strikes the ground near an optical fiber cable, there may be a discharge between the stroke point and the cable or it may induce currents and voltages on the metal structures of the optical cable. The buried shield wires laid close by the cable can reduce the harmful effects of the lightning. This paper uses the theory of earth conduction effects in a transmission system to analyze this problem. The closed form theoretical formulae for the screening effects of the buried shield wires are given.