We derive simple analytical expressions, using geometric optics, to describe the power output characteristics of various multimode devices, including acute angle X-junctions, symmetric Y-junctions and multimode interference couplers. The ray-tracing results compare well with results obtained using a finite difference beam propagation method solution of the governing scalar wave equation.
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机译:我们使用几何光学推导出简单的解析表达式,以描述各种多模器件的功率输出特性,包括锐角 X 结、对称 Y 结和多模干涉耦合器。光线追踪结果与使用控制标量波动方程的有限差分光束传播法解获得的结果具有很好的对比性。
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