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Abstract

In optical demultiplex transmission equipment, light conductor fibers are used for decoupling individual diffracted light signals of different wave length from a multiplex signal. These fibers have their input end regions arranged close together side-by-side in the diffraction plane of a diffraction grating. The respective diffraction angles of the light signals impinging on the grating are adjusted, by variation of the wave length of the light signals, so that the diffracted light beams fall into the input ends of respective output light conductor fibers. However, only every nth light conductor fibre is used for decoupling the various light signals (in which respect n is a natural number greater than one) so there may be spacer fibers disposed between the light-receiving output fiber. In this way, no complex output fibre guide is required and changes in channel spacing are possible without any structural changes being required.

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First Claim