| 摘要 |
<p>An optical communication line (1) comprising a first control unit (10); an optical transmission fibre (40), connected to the first control unit (10), for transmitting an optical signal; and an optical amplification unit (30) inserted along said optical transmission fibre (40) for amplifying the optical signal, said optical amplification unit (30) comprising, in turn, an optical amplifier (34) for amplifying the optical signal, a magneto-optical attenuator (31) connected to said optical amplifier (34), and a control device (32) for regulating the light transmissivity of the magneto-optical attenuator (31), wherein the first control unit (10) comprises a magneto-optical attenuator (11) and a control device (12) for regulating the light transmissivity of the magneto-optical attenuator (11) so as to superimpose service informations on the optical signal; and in that in the optical amplification unit (30), the control device (32) is suitable to regulate the light transmissivity of the magneto-optical attenuator (31) so as to superimpose service informations on the optical signal.</p> |
