Optical amplifier, transmission equipment, transmission system, and method

摘要

An optical transmission equipment for use in an optical transmission system includes an optical amplifier (10A), comprising a first optical doped fibre (1A), a second optical doped fibre (1B), a third optical doped fibre (1C), an optical isolator (6) provided between the first and second optical doped fibres for introducing loss in the optical signal, a dispersion compensator (7) provided between the second and third optical doped fibres, and a pumping light source (2) optically connected so that the optical doped fibres (1A, 1B, 1C) are excited in common.