Generator of optical data carrier signals with selectable carrier wavelengths

A generator (G1, G2, G3, G4, Gei) for generating at least M data carrier optical signals having selectable carrier wavelengths, where M is an integer greater than 1, said generator comprising N laser sources (Si;

• L1, . . . , LN/2) with constant and different wavelengths, where N is an integer greater than 1, and an optoelectronic modulator (Mod1) adapted to form one of said M optical data carrier signals,
• which generator is characterized in that it comprises:
• M−1 other optoelectronic modulators (Mod2 to ModM) each adapted to form one of said M−1 other optical data carrier signals, and
• an at least partically broadcasting optical switch (100, 1000, 101 to 132) having N input ports (PEi) coupled to the N laser sources and having M output ports (PSi) coupled to the M modulators, the optical switch being adapted to send a plurality of modulators (Mod2 to ModM) the same signal selected from the signals supplied by the laser sources, to form a plurality of signals.