论文部分内容阅读
在高功率光纤放大器系统中,受激布里渊散射(SBS)效应由于其较低的阈值特性成为光纤放大器功率提升的首要限制因素。为了提高SBS阈值,提出了一种基于对入射种子光同时施加相位调制和强度调制抑制SBS的新方法。建立了光纤激光放大器中的SBS效应激励模型对该方法进行理论仿真。仿真结果表明,该方法可以在窄线宽激光输出的条件下显著提高光纤激光放大器中的SBS阈值,在对20 W入射种子光同时施加100 MHz,10 V的相位调制和10 MHz,4 ns的强度调制后,放大器输出功率可达1127.4 W,为单频光SBS阈值的18倍。
In high-power fiber amplifier systems, stimulated Brillouin scattering (SBS) effects are the primary limiting factor for fiber amplifier power boost due to their lower threshold characteristics. In order to increase the SBS threshold, a new method based on suppression of SBS with phase modulation and intensity modulation on incident seed light is proposed. The SBS effect excitation model in fiber laser amplifier was established to simulate this method. The simulation results show that this method can significantly increase the SBS threshold in the fiber laser amplifier with narrow linewidth laser output, while applying 100 MHz, 10 V phase modulation and 10 MHz, 4 ns After intensity modulation, the output power of the amplifier can reach 1127.4 W, which is 18 times of the single-frequency light SBS threshold.