对大信号偏振去耦布里渊增强四波混频(BEFWM)相位共轭光的输出特性(波形、束散角、能量转换效率等)进行了系统的研究。结果表明,使布里渊增强四波混频工作在大信号强相互作用状态下,可以很好地克服同等抽运及结构条件下小信号布里渊增强四波混频中经常出现的波形调制现象,具有良好的波形稳定性以及输入输出脉冲的波形相关性; 输出光相位共轭保真度接近100%,且在不同注入信号强度下几乎保持恒定; 大信号布里渊增强四波混频能量转换效率相对小信号情况也有很大的提高。

The characteristics of the conjugate wave in Brillouin-enhanced four-wave mixing (BEFWM) with large incident signal are investigated experimentally. It is demonstrated that under the condition of large signal and deep interaction, temporal stability and correlation between the input and output pulse shapes are better than that of BEFWM with small signals, and modulation phenomena will no longer appear in this case. At the same time, the conjugation fidelity is almost 100% and constant with different signal intensities. With enlargement of the signal intensity, energy transform efficiency of BEFWM increases.