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在现有拉曼光纤放大器优化设计中,对拉曼散射耦合模型的求解是制约各种优化算法求解效率的瓶颈。提出运用最小二乘支持向量回归机,建立多抽运拉曼光纤放大器的输入输出回归模型,并利用该模型直接替代对拉曼散射耦合模型的求解,实现了优化速率数量级的提升。采用该方法对C波段的多波长反向抽运拉曼光纤放大器进行了优化实验,仅使用2个抽运源就可以迅速得到增益波动小于±0.5 d B的优化设计,并且其平均开关增益可以直接使用该模型进行快速调节。实验结果表明,相比传统的打靶法和平均功率法,通过该拉曼光纤放大器回归模型可以直接得到输出增益,极大地提高了设计的时效性,具有一定的参考价值。
In the existing Raman fiber amplifier optimization design, the solution to the Raman scattering coupling model is the bottleneck that restricts the efficiency of various optimization algorithms. The regression model of multi-pumping Raman fiber amplifier is established by using least-squares support vector regression machine. The model is used to directly replace the coupling solution of Raman scattering, and the order of magnitude of optimization speed is improved. This method is used to optimize the C-band multiwavelength anti-pump Raman fiber amplifier. With only two pumping sources, the optimal design of gain fluctuation less than ± 0.5 d B can be quickly obtained, and the average switching gain can be Use the model directly for quick adjustment. Experimental results show that, compared with the traditional shooting method and average power method, the output gain can be directly obtained through the Raman fiber amplifier regression model, which greatly improves the timeliness of the design and has certain reference value.