| 摘要 |
The present invention provides for an improvement in communication performance of an optical communication system which communicates data via N different channel wavelengths using WDM. In a case that not all of the N channel wavelengths are carrying data simultaneously, a switching unit may route data signals to selected channel wavelengths, selected to increase channel spacing between as many as possible channel wavelengths. In a case that time dependent changes, such as temperature changes, cause degradation in communication performance, channel hopping may be performed. Alternatively or additionally, a data rate reduction of data carried over interfered channels may be also performed. In a case that actual capacities of at least some of the N channels are lower than a maximum attainable channel capacity, channel condensation may be performed. The present invention also provides for a system combining channels at a bandwidth between 1.52 micrometer and 1.62 micrometer with a channel operating at 1.31 micrometer.
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