Reconfigurable device for insertion-extraction of wavelengths

A reconfigurable device for the insertion and extraction of wavelengths, this device being characterised in that it includes:

• a plurality of optical add-drop multiplexers(M1, M2, M3, M4) each having an input, an output, an insertion input and an extraction output,
• a main optical selector switch (C1, C10) with at least M positions, where M is the number of optical add-drop multiplexers, this main optical switch having an input and a plurality of outputs, each position allowing the connection of one of these outputs to said input of one of the optical add-drop multiplexers,
• a means of optical coupling (C2, C8) having an output and a plurality of inputs, respectively connected to said outputs of the optical add-drop multiplexers,
• and in that each optical add-drop multiplexer includes:
• a first optical means (F1i, 42) forming a band-pass filter, capable of directing, to the extraction output of the multiplexer, an optical signal among a group of optical signals with wavelengths differing from one another, arriving at said multiplexer input, and
• a second optical means (F2i, 44) which receives the other signals from the group and which is capable of inserting amongst them an optical signal coming from the insertion input of the multiplexer, these other signals and the inserted signal being sent to said multiplexer output.