Patent ID: 7302143

Claim:
An optical cable comprising: an optical core having at least one element for the transmission of optical signals; and a structure for protecting said at least one element, said structure being arranged in a position radially external to said optical core, said structure being a multilayer structure comprising: at least one first covering layer of polymeric material in a position radially external to said optical core; at least one covering layer of foamed polymeric material in a position radially external to said at least one first covering layer, wherein said at least one first covering layer is sufficiently rigid to mechanically support said at least one covering layer of foamed polymeric material; and at least one second covering layer of polymeric material in a position radially external to said at least one covering layer of foamed polymeric material, said foamed polymeric material having a density between 0.3 and 0.7 kg/dm3 and tensile modulus at 20° C. between 300 and 700 MPa.