锗硅玻璃全光极化的偏振和强度相关性研究  

Polarization and intensity dependence of all-optical poling in germanosilicate glass

作　　者：冯曦 李富全[2] 林傲祥[2] 王芳[2] 柴向旭[2] 朱启华[2] 王正平[1,3] 孙喜博[2] 孙洵 Feng Xi;Li Fuquan;Lin Aoxiang;Wang Fang;Chai Xiangxu;Zhu Qihua;Wang Zhengping;Sun Xibo;Sun Xun(State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China;Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China;Key Laboratory of Functional Crystal Materials and Device(Shandong University),Ministry of Education,Jinan 250100,China)

机构地区：[1]山东大学晶体材料国家重点实验室,山东济南250100 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [3]山东大学功能晶体材料及器件教育部重点实验室,山东济南250100

出　　处：《红外与激光工程》2019年第8期260-266,共7页Infrared and Laser Engineering

基　　金：国家自然科学基金(51323002,51402173)

摘　　要：搭建了可以连续控制基频光、倍频光偏振夹角的实验平台,并实现了一系列锗硅玻璃样品的全光极化。极化效果和极化方向由内建电场的大小和方向所决定,研究了两者与极化光束偏振态以及强度之间的关系。所获得的实验结果基本与经典模型及其推论相一致,但同时也发现了两者在定量方面的差异,包括局部变化趋势、角度大小等,这进一步说明了全光极化过程的复杂性。实验发现,当基频光与倍频光平行偏振时,极化过程效果最优;同时,极化过程对极化光束的强度也非常敏感。An experimental platform capable of continuously controlling the polarization angle of the 1ωand 2ω lights was constructed, and a series of all-optical poling of the silicon germanium glass sample was realized. The poling effectiveness and poled direction, which were determined by the magnitude and direction of internal electric field, correlations of which with the poling polarization state and intensity were studied. Basically the experimental results were consistent with the classic model and its derivation,but quantitative inconsistencies were found as well, including local tendency, angle size, etc, which further proved the complexity of the all-optical poling process. It was experimentally found that the effectiveness of the poling process was the best when 1ω and 2ω lights were polarized parallel, and the poling process was also very sensitive to the poling intensity.

关 键 词：非线性光学 全光极化 锗硅玻璃 二次谐波产生 

分 类 号：O437.1[机械工程—光学工程]