选用新介质的双池受激布里渊散射系统的研究  

Study on two-cell stimulated Brillouin scattering system with new media

作　　者：哈斯乌力吉[1] 吕志伟[1] 李强[1] 巴德欣[1] 何伟明[1] 

机构地区：[1]哈尔滨工业大学光电子技术研究所,哈尔滨150001

出　　处：《物理学报》2007年第3期1385-1389,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10476009;60478020);中国博士后科学基金(批准号:20060390795);哈尔滨工业大学优秀团体支持计划资助的课题.~~

摘　　要：从介质化学结构与吸收系数的关系入手,寻找出系列吸收系数小,适合作为放大池介质的新介质,例如四氯乙烯(C2Cl4),1,3-六氯丁二烯(C4Cl6)和六氟化苯(C6F6)等,并计算或测量了入射光波长为1.064μm时的新介质受激布里渊散射(SBS)参数.在双池SBS系统的放大池中分别选用C2Cl4和C4Cl6,振荡池中均选用光学击穿阈值高,并且布里渊频移与C2Cl4和C4Cl6的布里渊频移非常接近的乙醇(C2H5OH),并利用Nd:YAG调Q激光器研究了该系统的性能.实验结果表明,该系统具有高负载能力,高相位共轭保真度和高能量反射率稳定度等性能.According to the relationships between the chemical structure of the medium and the absorption coethcient, a senes of new media with small absorption coefficients has been found, which are suited for use as the amplifier media. The stimulated Brillouin scattering （SBS） parameters of these media have been calculated or measured when the pump wavelength is 1.064 μm. Choosing C2 Cl4 and C4 Cl6 as amplifier medium and C2 H5 OH as generator medium, we investigated the performances of two-cell SBS system pumped by Nd：YAG Q-switched laser. The C2 H5 OH has a high optical breakdown threshold and the Brillouin frequency shift of C2 H5 OH is close to those of C2 Cl4 and C4 Cl6. The results indicate that the system has the characteristics of high powerload ability, high phase-conjugation fidelity and high energy reflectivity stability.

关 键 词：受激布里渊散射 双池SBS系统 新介质 化学结构 

分 类 号：O437.2[机械工程—光学工程]