| 摘要 |
A special solution is required in closed fiber rings in order to remove OCDM transmission signals from the optical ring after they have passed the corresponding receiving node. This object is achieved by an OCDM detection device containing an OCDM detector for detecting received OCDM signals and an optical component controlled by the OCDM detector for transmission or non-transmission of received OCDM signals in at least one optical line. In a variation the OCDM detector detects special OCDM signals in an individual optical transmission channel and is designed in such a way that the optical component is controlled for transmission of OCDM signals if no special OCDM signals are detected and the optical component is controlled for non-transmission of OCDM signals if special OCDM signals are detected.
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