梯形截面脊波导的特性分析

Analysis of Rib Waveguides with Trapezoidal Cross Section

提出了用有效折射率法结合转移矩阵理论对梯形截面脊波导进行数值分析的新方法。对梯形截面脊波导中模式传播常数和模式间耦合系数的分析表明 ,梯形截面脊波导与稍宽的矩形截面脊波导行为相同。这一结论有利于简化梯形截面脊波导的设计 。

To analyze rib waveguides with trapezoidal cross section, a simple numberical analysis is presented which uses effective index method and transfer matrix theory. Results of the propagation constants and the coupling coefficients between modes in trapezoidal cross sectioned rib waveguides show that they have the same action with wider rectangular cross sectioned rib waveguides. This will simplify the designing of trapezoidal cross sectioned rib waveguides and increase the precision of practical device.