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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 ,提高实际器件的精度
A new method of numerical analysis of trapezoidal ridge waveguide with effective refractive index and transfer matrix theory is proposed. The analysis of mode propagation constant and mode coupling coefficient in trapezoidal cross-section ridge waveguide shows that the trapezoidal cross-section ridge waveguide has the same behavior as the slightly wider rectangular cross-section ridge waveguide. This conclusion is helpful to simplify the design of trapezoidal ridge waveguide and improve the precision of the actual device