受激拉曼散射（SRS）效应是制约高功率激光单模光纤远距离传输应用的瓶颈因素。采用1550nm非偏振连续波单模光纤激光器作为光源， 通过实验研究了不同注入光功率条件下经过103km单模光纤传输所产生的受激拉曼散射现象，运用级联长周期光纤光栅带阻滤波器进行了受激拉曼散射抑制实验，并进行了相应的理论分析。提出了光纤受激拉曼散射抑制有效性判据，实验演示了受激拉曼散射现象，验证了级联长周期光纤光栅带阻滤波器对受激拉曼散射抑制的有效性。

Stimulated Raman Scattering （SRS） effect is a key factor restricting the application of high power laser transmission over single mode fiber in long distance . Using 1550nm unpolarized continuous wave single-mode fiber laser as light source， stimulated Raman scattering phenomenon generated by 103km single-mode fiber transmission under different injected light power conditions is experimentally studied. Cascaded long-period fiber gratings are used to carry out stimulated Raman scattering suppression experiments， and corresponding theoretical analysis is carried out. A criterion for the effectiveness of fiber stimulated Raman scattering suppression is proposed. Experiments demonstrate the stimulated Raman scattering phenomenon and verify the effectiveness of cascaded long-period fiber gratings for the suppression of stimulated Raman scattering.