| 摘要 |
A pump source for broadband amplification of a wavelength-division multiplexed signal transmitted via an optical fiber having a number of low-power pump lasers, whose input signal power levels are increased in a conversion fiber. One or more high-power lasers such as Raman cascade lasers on the one hand, and one or more monomode laser diodes with a low output power, on the other hand, are used as the pump lasers. Pump signals from the monomode laser diodes are subjected to Raman amplification in the conversion fiber before providing broadband amplification of the WDM signal in the transmission fiber by stimulated Raman scatter. The powers required for the amplified pump signals at the output of the conversion fiber are achieved by respective pump power increases in the pump signals of the monomode laser diodes, and by using monomode laser diodes with different output powers, as well as via a corresponding arrangement of the input coupling of the output signals of the pump lasers into the conversion fiber.
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