Analysis of Slanted Gratings for Lightguide Coupling
Abstract
Slanted gratings are commonly used for coupling light into optical lightguides due to their high efficiency in a certain diffraction order. Nowadays, they are often applied in augmented and mixed reality applications. We show how VirtualLab Fusion can be used to analyze certain slanted grating geometries from literature, with specific parameters like slant angle, fill factor, and modulation depth. In addition, the effect of different incidence angles on the diffraction efficiency is investigated.
VirtualLab Fusion Configuration
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VirtualLab Fusion
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Grating Package
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Tutorial
Configuration of Grating Structures by Using Special Media
In the VirtualLab’s Grating Software Package grating structures can be configured by using a stack.
Use Case
Parametric Optimization and Tolerance Analysis of Slanted Gratings
With the Fourier modal method (FMM) as the kernel on which parametric optimization a slanted grating is designed to achieve high diffraction efficiency.