This article presents a method for integrating traveling wave models (TWMs) into an optical circuit simulator based on modified nodal analysis (MNA) techniques previously developed for electrical circuit simulation. TWMs of optical propagation through waveguides provide flexible distributed descriptions of optical devices from simple waveguides to lasers. The model is, however, by definition an explicit time marching method and does not fit naturally into an MNA formulation. This article will show a method of integrating the TWM into a fully implicit multidomain (electrical/optical) circuit simulator based on MNA techniques. It will first describe the TWM for simple optical propagation and then its extension for optical gratings, amplifiers, and lasers. The integration of the TWM model into the MNA-based engine will then be specified, showing how the model is implemented using nonlinear optical sources. Finally, a set of examples, including waveguides, filters, and electro-optic devices will be used to show the effectiveness of the technique.

中文翻译：

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将行波光学器件模型集成到基于 MNA 的电路模拟器中

本文介绍了一种将行波模型 (TWM) 集成到光路模拟器中的方法，该方法基于之前为电路仿真开发的改进节点分析 (MNA) 技术。通过波导的光传播的 TWM 提供了对从简单波导到激光器的光学器件的灵活分布式描述。然而，根据定义，该模型是一种明确的时间推进方法，并不自然适合 MNA 公式。本文将展示一种将 TWM 集成到基于 MNA 技术的全隐式多域（电/光）电路模拟器的方法。它将首先描述用于简单光传播的 TWM，然后是它对光栅、放大器和激光器的扩展。然后将指定将 TWM 模型集成到基于 MNA 的引擎中，展示了如何使用非线性光源实现模型。最后，将使用一组示例，包括波导、滤波器和电光设备来展示该技术的有效性。