TN252 2003021113渐变折射率光波导模场分布的矢量FD-TD法分析=Vectorfinite difference time domain method analysis for modefield distribution of the variable index optical waveguide/刘靖(岳阳师范学院物理系.湖南,岳阳(414006...TN252 2003021113渐变折射率光波导模场分布的矢量FD-TD法分析=Vectorfinite difference time domain method analysis for modefield distribution of the variable index optical waveguide/刘靖(岳阳师范学院物理系.湖南,岳阳(414006)),张国平…//光电工程.—2002,29(3).—32-34,71用二维矢量时域有限差分法分析了变折射率光波导中基模的模场分布情况。采用平面光波、球面光波、高斯光波等五种不同形态的光波激励同一波导,借助计算机进行数值求解,得到的光场分布图在光场传播达到稳定后完全相同,说明了波导的模式与光波形态无关,只与波导结构和光波波长有关,结果直观、精确、快速。展开更多
This paper researches end diffraction of slab waveguide and then matching efficiency between the far-field and its Gaussian approximate field is analyzed leads to a new definition of divergence half-angle. Finally, wh...This paper researches end diffraction of slab waveguide and then matching efficiency between the far-field and its Gaussian approximate field is analyzed leads to a new definition of divergence half-angle. Finally, why the far-field can be approximated by a Gaussian function is presented according to characteristic of beam propagation factor.展开更多
文摘TN252 2003021113渐变折射率光波导模场分布的矢量FD-TD法分析=Vectorfinite difference time domain method analysis for modefield distribution of the variable index optical waveguide/刘靖(岳阳师范学院物理系.湖南,岳阳(414006)),张国平…//光电工程.—2002,29(3).—32-34,71用二维矢量时域有限差分法分析了变折射率光波导中基模的模场分布情况。采用平面光波、球面光波、高斯光波等五种不同形态的光波激励同一波导,借助计算机进行数值求解,得到的光场分布图在光场传播达到稳定后完全相同,说明了波导的模式与光波形态无关,只与波导结构和光波波长有关,结果直观、精确、快速。
基金Supported by the Program of Fujian Education Department under Grant No. JB09069the Natural Science Fund of Fujian Province under Grant No. 2009J01275
文摘This paper researches end diffraction of slab waveguide and then matching efficiency between the far-field and its Gaussian approximate field is analyzed leads to a new definition of divergence half-angle. Finally, why the far-field can be approximated by a Gaussian function is presented according to characteristic of beam propagation factor.
