摘要:
The present document relates to optical transmission systems. In particular, the present document relates to optical submarine transmission systems. A branching unit (210) for an optical transmission system (200) is described. The branching unit (210) comprises a first and a second input port configured to be coupled to a first and a second incoming fiber (320, 321), respectively; a first output port configured to be coupled to a first outgoing fiber (322); wherein the second incoming fiber (321, 323) is part of an optical cable comprising an electrical conductor; wherein the branching unit (210) is configured to receive electrical power via the optical cable; and an optical by-pass switch (345) configured to switch between a first mode, and a second mode; wherein in the first mode, the by-pass switch (345) is configured to couple the second incoming fiber (321) to the first outgoing fiber (322); and wherein in the second mode, the by-pass switch (345) is configured to couple the first incoming fiber (320) to the first outgoing fiber (322).
摘要:
A method of transmitting optical signals in a submarine optical network and an optical unit for performing the method, the optical unit is configured for receiving an optical signal comprising a plurality of wavelengths where at least some of the wavelengths comprise traffic data. The optical unit includes a processor unit which is configured for scrambling the shape of at least one wavelength comprising traffic data of the optical signal so as to make said traffic data of said at least one wavelength undetectable for a receiver station.