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Raman amplifier with gain enhancement from optical filtering
Raman amplifier with gain enhancement from optical filtering
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机译：拉曼放大器具有光学滤波带来的增益增强
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摘要
A fiber Raman amplifier with increased gain and improved pump conversion efficiency is formed by including a high pass optical filter in the amplifier structure. The filter may comprise one or more discrete components, or may be formed as a distributed filter along the length of the fiber amplifier. The cut-off frequency for the high pass optical filter is selected to be immediately below the frequency of the input signal to be amplified. When used in an arrangement with multiple input signals, the cutoff frequency is controlled to be immediately below the lowest input signal frequency.
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