| 摘要 |
It is an object of the invention to provide a WDM optical communication system, which is small-sized and low-priced, and equalizes transmitting optical signal levels. WDM optical signals is amplified by an optical fiber amplifier, split by a multiple splitter, separated by optical band pass filters into several groups of optical signals of different wavelengths, which are separately and collectively amplified by optical fiber amplifiers, adjusted in their levels and multiplexed by a multiple coupler.
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