Er/Yb共掺光纤脉冲放大器中的受激布里渊散射  

Stimulated Brillouin scattering in Er/Yb co-doped fiber pulse amplifiers

作　　者：周雷[1] 宁继平[1] 陈王争[1] 韩群[1] 张伟毅[1] 王俊涛[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室,天津300072

出　　处：《激光技术》2009年第5期482-485,共4页Laser Technology

摘　　要：为了精确模拟脉冲放大器中的受激布里渊现象,修正了脉冲光纤放大器中受激布里渊散射瞬态演变模型,建立了基于Er/Yb共掺双包层光纤中动态速率方程的受激布里渊散射的瞬态模型,同时包括了受激布里渊散射的信号光能量转移和反转粒子数消耗两个增益获得过程,采用有限差分的方法,分析了受激布里渊散射在高功率、低重复频率、窄脉冲光纤放大器中对输出脉冲信号单脉冲能量、峰值功率、频谱和时域波形的影响。搭建了两级放大的主振功率放大实验平台,利用重复频率为156kHz的调Q脉冲信号进行了高功率脉冲放大实验,得到了1.32W的平均功率输出,以及受激布里渊级联频谱和时域波形情况。结果表明,实验与理论分析相吻合,同时也验证了这个修正模型的正确性和有效性。In order to simulate the stimulated Brillouin scattering （SBS） in a pulse amplifier, its transient model was modified based on the time dependent rate equation in an Er/Yb co-doped fiber, including both gain-increasing processes of signal light transfer and dissipation of inverse populations. The influence of SBS on the single pulse energy, peak power, spectrum and time domain waveform in a fiber laser with high power,low repetition rate, narrow pulse width was analyzed. A two-stage master oscillator power amplifier （MOPA） experimental setup was built based on a 156kHz, Q-switched pulse signal. In the experiment, average output power of 1.32W was obtained and the frequency spectra and time domain waveform of serial SBS was observed. The experimental results are eonformal to the theoretical results, which proves the validity of the modified model.

关 键 词：光纤放大器 受激布里渊散射 有限差分法 主振功率放大 

分 类 号：TN722[电子电信—电路与系统]