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Analysis on Mode Field Distribution of Waveguide Grating Coupler by the Scalar FDTD

机译:用标量FDTD分析波导光栅耦合器的模场分布

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摘要

The scalar two-dimensional finite difference time domain (FDTD) method is applied to simulate the mode field distribution of TE0 of the waveguide grating coupler. Computer simulation shows that the same stable mode field distribution pattern is obtained through the different kinds of driving sources. It is found that the optical field mode is determined by waveguide structure and optical wavelength other than the driving source.According to the mode field distribution, the optimum coupling efficiency can be predicted. Compared with another numerical methods,the CPU-time and memory elements of computer used by FDTD are much less.
机译:采用标量二维有限差分时域(FDTD)方法来模拟波导光栅耦合器TE0的模式场分布。计算机仿真表明,通过不同种类的驱动源可以获得相同的稳定模式场分布图。发现光场模式是由波导结构和光波长决定的,而不是由驱动源决定的。根据模式场的分布,可以预测出最佳的耦合效率。与其他数值方法相比,FDTD使用的计算机的CPU时间和存储元素要少得多。

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