In this work, we analyze the effects of the presence of waveguides in a wireless on-chip optical channel, which act as obstacles for the rays composing the propagating signal. The analysis has been performed numerically by using the FDTD method, and the simulation results have been validated by the experimental characterization. This work focuses on the relationship between the received signal and the position of the obstacles on the circuit plane in a multilayered channel made of heterogeneous dielectric cladding. We show how the crossing waveguide perturbates the received power and we provide ad hoc guidelines for the best topological choices allowing to mitigate losses. Moreover, with a good agreement between numerical and experimental results, amounting to a variation of less than 1 dB, we have demonstrated that the effects of this perturbation in real chips can be predicted. The results of this analysis, as well as increasing the level of knowledge of on-chip optical wireless links, allow a better comprehension and control of unbound optical signals within the optical chip environment.

中文翻译：

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存在障碍物时片上光无线链路的数值与实验分析

在这项工作中，我们分析了无线片上光通道中存在波导的影响，这些波导对构成传播信号的光线构成障碍。使用FDTD方法进行了数值分析，模拟结果已经通过实验表征进行了验证。这项工作的重点是在由异质介质包层制成的多层通道中，接收信号与电路平面上障碍物的位置之间的关系。我们展示了交叉波导如何扰动接收到的功率，并为最佳拓扑选择提供了临时指南，以减轻损耗。此外，数值和实验结果之间有很好的一致性，变化小于 1 dB，我们已经证明这种扰动对真实芯片的影响是可以预测的。这种分析的结果，以及提高片上光无线链路的知识水平，可以更好地理解和控制光芯片环境中未绑定的光信号。