| 摘要 |
A low noise optical amplifier which uses stimulated Raman amplification for dense wavelength division multiplexed optical fibre links and networks, that uses a plurality of pump wavelengths, individually power adjusted, in control loops which use a spectrum monitor as input, to provide a set gain to a particular wavelength channel and gain flattening across the DWDM spectrum. The amplifier has a first power control loop for a given wavelength channel, and a second control loop for maintaining the powers of the remaining channels relative to the given channel.
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