Optical drop/insert multiplexer

摘要

The circuit includes a demultiplexer (DS2), switching device (S1) and control (MC) which are used to separate N optical carriers. A number E of optical carriers are selected for the multiplex extract (MT), and for selecting T transmission carriers. A further switching element (S4) selects I insertion carriers from amongst N carriers. Coupling and wavelength converters (S2,CL,MC) then attribute fixed wavelengths to the signals modulating the transmission carriers and the carriers for insertion.