We propose and numerically analyze a unique optical waveguide crossing based on a silicon-on-insulator (SOI) slab waveguide structure. The optical waveguide crossing consisting of four curved mirrors made of silica walls and beam spot-size converters formed in a silicon core layer of the SOI slab waveguide. Based on our design with a device footprint of 15 × 15 μm2, we obtained excellent device performances such as insertion loss of −0.3 dB, crosstalk of less than −35 dB in the wavelength range from 1.25 μm to 1.6 μm with the 3D-FDTD simulation.

中文翻译：

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基于SOI平板波导的光波导交叉

我们提出并数值分析了一种基于绝缘体上硅 (SOI) 平板波导结构的独特光波导交叉。光波导交叉由四个由二氧化硅壁制成的曲面镜和在 SOI 平板波导的硅芯层中形成的束斑尺寸转换器组成。基于我们的器件占位面积为 15 × 15 μm2 的设计，我们获得了出色的器件性能，例如使用 3D-FDTD 在 1.25 μm 到 1.6 μm 的波长范围内的插入损耗为 -0.3 dB，串扰小于 -35 dB模拟。