光子学报, 2011, 40 (5): 794, 网络出版: 2011-06-14
线性对称耦合器的几何表示
Geometrical Representation of the Linear Symmetric Coupler
光学开关 线性对称耦合器 耦合波方程 布洛赫矢量 Optical switching Linear symmetric coupler Coupled-wave equation Bloch vector
摘要
利用线性对称耦合器两个波导中光场的电矢量构建了布洛赫矢量模型.通过布洛赫矢量的旋转变化使得光在两个波导通道中“跃迁”的过程非常直观.研究发现,随着线性对称耦合器的相位失配变得越严重,光能量在波导间的转换频率增快且转换效率降低,与传统的求解线性对称耦合器耦合波方程所得到的结果是一致的.
Abstract
A Bloch vector model was set up using the light field electric vector in two waveguides of the liner symmetric coupler. The light “transition” process in two waveguide channels was quite directly with the Bloch vector rotation changing. It was found that the more serious the propagation constant mismatches, the faster the frequency of light energy exchanges and the lower efficiency exchanges, which is equal to the results solved by the traditional equations.
时坚, 马瑞琼, 王翀, 杨祎, 段作梁, 苗润才. 线性对称耦合器的几何表示[J]. 光子学报, 2011, 40(5): 794. SHI Jian, MA Rui-qiong, WANG Chong, YANG Yi, DUAN Zuo-liang, MIAO Run-cai. Geometrical Representation of the Linear Symmetric Coupler[J]. ACTA PHOTONICA SINICA, 2011, 40(5): 794.