| 摘要 |
An optical amplifier contains two amplifier paths. An optical user signal (alpha, beta) is in each case supplied to an optical amplifier (EDF1, EDF2) through direction separators (RT1, RT2). Each amplifier is followed by a wavelength multiplexer (WDM1, WDM2) via which a pump signal (gamma1, gamma2) is fed in, which, via the direction separator (RT2, RT1) which is connected to its output, pumps the amplifier (EDF2, EDF1) in the other amplifier path in the direction of the user signal (alpha, beta).
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