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在分析拉曼光纤放大器(RFA)原理的基础上,采用遗传算法对5波长后向泵浦拉曼光纤放大器的波长和功率进行了优化设计。实验采用位于5个波长处的7个泵浦激光器和100.8 km的色散位移光纤,实现了带宽为90 nm、开关增益为15.55 dB、增益平坦度为0.87 dB的拉曼放大,其平均有效噪声系数为-3.5 dB,与理论分析结果一致。
Based on the analysis of the principle of Raman fiber amplifier (RFA), the wavelength and power of 5-wavelength pump-pumped Raman fiber amplifier are optimized by genetic algorithm. The experimental results show that Raman amplification with bandwidth of 90 nm, switching gain of 15.55 dB and gain flatness of 0.87 dB achieved by using seven pump lasers and 100.8 km dispersion-shifted fibers located at five wavelengths. The average effective noise figure -3.5 dB, consistent with the theoretical analysis.