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In this article, a multi-scale simulation workflow is introduced for the design of a fiber-to-waveguide coupling system for photonics integrated circuits. The microscopic light interactions with the grating coupler are simulated with Ansys Lumerical, while Ansys Zemax OpticStudio is used for macroscopic propagation and tolerancing. This application gallery example workflow consists of four steps. The first two simulate the system when light is propagated from the grating coupler to the fiber (“out” direction), whereas the last two steps simulate the system when light is propagated from the fiber to the grating coupler (“in” direction). The contributions to the system loss for both directions, as well as the tolerance to fiber lateral shift are analyzed.
Read the full article here: https://optics.ansys.com/hc/en-us/articles/21008392675347