| 摘要 |
It is an objective of the invention to reduce the technical complexity involved in the implementation of optical filters used in particular for the encoding and decoding of OCDM signals. It is also intended to simplify the tuning in order, on the one hand, to make the selection of the required transmission channels as simple as possible and, on the other, to be able at the receiving end to regulate the optical filter drift at the transmitting end for optimum reception. This object is achieved by an optical filter arrangement containing a first optical filter and a second optical filter connected in series or in parallel and with the second optical filter having an FSR adjustment range differing from the FSR adjustment range of the first filter. An advantageous effect is that the second optical filter facilitates fine tuning, with in particular the readjustment at the receiving end of optical filter drifts at the transmitting end being simplified.
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