Metropolitan optical telecommunications network comprising a ring-type core

摘要

The optical network has a fibre optic centre (10) with an access node (11) having a transmitter unit (111) with a carrier belonging to a set of wavelengths belonging to a secondary ring (41,42). There are optical (100) insertion units (1,2) inserting the signal in the optical node and optical couplers (31,32) removing part of the carrier power information at the reception point.