Patent ID: 6999661

Claim:
A configuration for coupling optical signals of at least one optical data channel at least one of into and out of an optical waveguide carrying optical signals of at least two optical data channels, comprising: at least two optical waveguide sections disposed axially one behind another along an optical axis, said at least two optical waveguide sections each having core regions disposed one behind another with respect to said optical axis and separated from one another on said optical axis by a free-radiating region; at least a first one of said at least two optical waveguide sections having an end face at which light to be coupled at least one of out or in is reflected, said end face running obliquely with respect to said optical axis, said end face: being coated with a wavelength-selective filter; and passing light for a given optical data channel through said free-radiating region and reflecting the light for the given optical data channel before or after passing through said free radiating region, to thereby couple the light of the given optical data channel at least one of into and out of a second one of said at least two optical waveguide sections; and at least said second one of said at least two optical waveguide sections having an end face at least one of from which light to be coupled out emerges or onto which light to be coupled in is reflected, said end face running at least partly perpendicular to said optical axis.