受激布里渊散射介质——全氟聚醚的温度特性研究

Investigation on stimulated Brillouin scattering medium——perfluoropolyether at high and low temperatures

受激布里渊散射(SBS)介质——全氟聚醚(PFPE)不仅具有低吸收高负载的SBS特性,还具有低的流点或高的沸点,可适合于较宽温度范围之内工作.通过分析PFPE的化学结构,对PFPE具有良好的SBS特性及独特物理化学特性进行了解释.在连续Nd:YAG种子注入激光系统中选用HT230,DET和HS260三种PFPE进行了不同温度下SBS特性研究.结果表明,PFPE不仅具有良好的SBS特性,还可以在低温或高温条件下工作,这为不同温度下研究SBS相位共轭镜打下了良好的基础.

In this paper,the stimulated Brillouin scattering（SBS） media perfluoropolyether（PFPE） with unique physicochemical properties and SBS properties are researched.The PFPE has a small absorption coefficient and can be used to increase the load-ability of SBS system.The PFPE with a high boiling point and a low pouring point can operate at high and low temperatures,respectively.The SBS properties of PFPE have been analyzed in detail and validated in Qswitched Nd：YAG laser system.The experimental results indicate that the media not only have good SBS characteristics but also can be used in a wide temperature range,thereby has great advantage for experimental investigation on SBS phase-conjugated mirror at different temperatures.