Filtering of a WDM optical signal with a configuration filter

摘要

A method for filtering a WDM optical signal comprises:
- sending a WDM optical signal to a configurable filtering device that has a spectral granularity (20) and a plurality of configurable filter slot boundaries that are spaced from one another, wherein two adjacent filter slot boundaries are spaced by a filter slot width corresponding every time to an integer multiple of the spectral granularity (20), wherein the configurable filtering device is adapted to generate a plurality of optical filters each affecting a spectral slot defined between two adjacent filter slot boundaries, and
- configuring the filter slot boundaries of the filtering device so as to arrange a respective one of the filter slot boundaries within each unoccupied band between the occupied bands (2) of two adjacent spectral components (4) of the WDM optical.