科技论文(格式参考).doc

基于结模型的极化石英光纤内建电场分析 戴正权1，任一涛2，钟丽辉1，禹玥昀1，徐全元1 （1西南林业大学计算机与信息学院，云南 昆明650224） （2云南大学物理科学技术学院物理系，云南 昆明650091） 摘要 用多载流子模型分析了D型石英光纤的热极化过程及耗尽层的形成，分析了氢离子注入及钠离子耗尽层的形成。并把正负电荷的交界处类比为p-n结，分别计算了所形成的内建电场大小。最终得出极化完成后石英光纤的二阶非线性效应主要由钠离子的耗尽而形成，计算出的内建电场大小约为，由此算出的二阶非线性系数的数值在之间，和实验报道数值符合较好。 关键词 热及电场极化；石英光纤；二阶非线性；p-n结；内建电场 Analysis of built-in Field in poled silica fiber using a junction model DAI Zhengquan1, REN yitao2 , ZHONG lihui1, YU yueyun1, XU quanyuan1 (1.School of computer and Information, Southwest Forestry University, Yunnan Kunming 650224 china) (2.School of Physical Science and Technology, Yunnan University, Yunnan Kunming 650091 china) Abstract: The thermal poling process in the type of D silica fiber and the formation of its depletion layer is analyzed by multi-carriers’ model. Analysis of the formation of hydrogen ion injection and Na ion depletion layer. We draw an analogy between interface and p-n junction that the interface consists of positive and negative charges, The built-in electric field has been calculated respectively, The generated nonlinearity is determined mainly by the induced built-in electric field (108V/m) in the Na ion depletion. The second-order nonlinearity values are with 0.1~0.6pm/V, Consistent with the experimental data. Key words: Thermal/Electric-field poling; Silica fiber; Second-order nonlinearity; p-n junction; Built-in electric field 1引言 石(英通常情况下不具有二阶非线性效应但在1991年. Myers等人利用热及电场极化技术在石英玻璃中诱导出了高达1的二阶非线性系数，为使用材料制备非线性光学元件开辟了新方向。 3 内建电场的计算与分析 3.1 氢离子注入引起的电场计算 3.2 钠离子的迁移引起的电场计算 4 结论 R. A. Myers, N. Mukherjee and S. R. J. Brueck, “Large second-order nonlinearity in poled fused silica” [J], Opt. Lett., 1991,16(22):1732-1734. Kazansky P G, Dong L , Russell P S J . High second2order nonlinearities in poled silicate fiber[J]. Opt . Lett . 1994, 19 (10):701-703. (10) :701～703T. G. Alley, S. R. J. Brueck, R. A .Myers, “space -charge dynamics in thermally poled fused silica”, J Non-Cryst State, 1998, 242(12):165-176. W. Xu, J. Arentoft, D. Wong,et al. “Ev