中文摘要：

实验研究了单频单模保偏掺Yb光纤放大器中的受激布里渊散射（SBS）效应。采用前向抽运的两级级联掺Yb光纤放大器，研究了保偏光纤放大器中的受激布里渊散射的光谱变化特性。理论计算的单模光纤的布里渊频移和SBS阈值与实验测试的结果进行了比较。在光纤放大器前后两端观察到多级次的斯托克斯（Stokes）谱线和多级的反斯托克斯（anti—Stokes）谱线，这是由级联受激布里渊散射和四波混频过程产生的。

英文摘要：

Experimental results for the stimulated Brillouin scattering （SBS） in the single-frequency, single-mode, linearly polarized ytterbium-doped fiber amplifier are reported. The fiber amplifier configuration comprises of twostage master oscillator power amplifier with co-propagating signal and pump light. The evolution of SBS spectra is investigated in the experiments. Multiorder Stokes and anti-Stokes scattering can be observed in the forward and backward directions of the fiber amplifier, which generate through cascaded SBS and four-wave mixing process.