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Effective suppression of stimulated Raman scattering in high power fiber amplifiers using double-pass scheme

机译:使用双通方案有效抑制大功率光纤放大器中的受激拉曼散射

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High power fiber laser amplifier cascade can be simplified using double-pass scheme due to improvement of overall efficiency, especially for amplifiers with small input seed or high stored energy. The yield of stimulated Raman scattering (SRS) in the double-pass scheme is comparable to the level in amplifiers using counter-directional-pumped single-pass scheme if the pumping configuration is appropriate, even though the interaction length becomes twice for double pass scheme. In the study, insertions of Raman strippers along the active fiber with double-pass scheme is proved to be another choice to effectively suppress SRS besides the utilization of photonic band-gap fibers.
机译:高功率光纤激光放大器的级联可以使用双通道方案简化,这是由于整体效率得到了改善,尤其是对于具有较小输入种子或高存储能量的放大器而言。如果泵浦配置合适,则双通方案中的受激拉曼散射(SRS)的产量与使用反向泵浦单通方案的放大器的水平相当,即使相互作用长度对于双通方案变为两倍。在研究中,除了利用光子带隙光纤之外,还证明了通过双通方案沿有源光纤插入拉曼剥离器是有效抑制SRS的另一种选择。

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