不均匀磁场中的静磁波传播和导波光衍射理论  

Theory of Magnetostatic Wave Propagation and Magnetooptic Bragg Diffraction in YIG GGG Waveguide Under Nonuniform Bias Magnetic Field

作　　者：ChenS.Tsai 刘公强 

机构地区：[1]上海交通大学应用物理系

出　　处：《光学学报》1999年第1期63-71,共9页Acta Optica Sinica

基　　金：上海市自然科学基金

摘　　要：理论研究了不均匀静磁场对静磁体波传播和导波光布拉格（Ｂｒａｇｇ）衍射特性的影响。计算表明，在场强分布适当的不均匀磁场中，静磁体波的振幅有所增加，从而可以明显提高导波光的布拉格衍射效率。此外，有望通过不均匀静磁场来控制衍射光的发散。A theoretical treatment on the propagation characteristics of magnetostatic forward volume wave (MSFVW), in a four layer YIG GGG (Yttrium iron garnet Gadolinium gallium garnet) waveguide structure under a nonuniform bias magnetic field, and related guided wave magnetooptic (MO) Bragg diffraction is presented. A nonuniform bias magnetic field of appropriate profile along the propagation path is found to have the effects of enhancing the power density of MSFVW and thus the corresponding MO Bragg diffraction efficiency, and to have the possibility of controlling the degree of divergence in the diffracted light.

关 键 词：光导波 静磁波 不均匀静磁场 衍射 

分 类 号：TN25[电子电信—物理电子学]