全氟碳化合物新介质SBS相位共轭镜和光限幅器选取原则的研究

Study on the choosing of new SBS medium perfluoro-compound for phase conjugation mirror and optical limiter

介绍了低吸收高负载特性的全氟碳化合物SBS新介质,研究了SBS相位共轭镜和SBS光限幅器对新介质的选取原则,并在Nd:YAG调Q激光器中进行了实验验证.结果表明,SBS相位共轭镜需要平均分子量小,运动黏度小,增益系数大的介质;而SBS光限幅器需要平均分子量大,运动黏度大,增益系数小的介质.新介质的发现增加了SBS介质的种类,而介质的选取原则对新介质的选用打下了良好的基础.

In this paper,new stimulated Brillouin scattering（SBS） medium of perfluoro-compound with low absorption and high power-load are reported.The choosing of medium for conjugation mirror（PCM） and optical limiting are discussed respectively,and validated in the Nd：YAG Q-switched laser system.The results indicate that medium with small molecular weight,low kinematic viscosity and large gain coefficient should be chosen for SBS PCM,however,medium with large molecular weight,great kinematic viscosity and small gain coefficient is needed in the optical limiting.The discovery of the new medius diversifies the SBS media and the medium choosing rules provide a guide to the application the new medium.