Arrangement for producing a wavelength-multiplex signal having small interchannel spaces

Arrangement for generating a wavelength multiplex signal (WMS) having low channel spaces with a plurality of M (m=2, 3, . . . ) wavelength multiplexers (WM1, WM2, . . . WMm), whereby optical signals (KS11 to KS1n;

• KS21 to KS2n;
• . . . ;
• KSm1 to KSmn), whose channel spaces (KAE) respectively correspond to the mth channel spacing (KAM) of the wavelength multiplex signal (WMS) and whose transmission bands are offset by the channel spacing (KAM) of the wavelength multiplex signal (WMS), are supplied, in a group, to said wavelength multiplexers, and the use of an optical coupler (KO) whose inputs are connected [. . .] outputs of the wavelength multiplexers (WM1, WM2, . . . , WMm) for generating the wavelength multiplex signal (WMS), characterized in that
• the transmission bands of the wavelength multiplexers (WM1, WM2, . . . , WMm) have a greater bandwidth than the ones of a pertaining demultiplexer on the receive side and are fashioned in a broadband manner such that a limitation of the spectrum of the optical signals (KS11 to KS1n;
• KS21 to KS2n;
• . . . ;
• KSm1 to KSmn), which are respectively supplied to them in a group, only negligibly impairs the signal quality.