| 摘要 |
A submarine optical gain equalizer installed on a submarine optical transmission cable 5 comprises a pressure housing 1, in which an optical gain equalizer and n through-fibers are installed. Input and output ports of the optical gain equalizer and the through-fibers are formed in the outside of the pressure housing. The submarine optical gain equalizer equalizes levels of signal light having wavelengths different from each other caused by optical fiber amplifiers. In general, one submarine optical gain equalizer is installed for every 40 optical fiber amplifiers on a submarine optical cable.
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