Optimization of Lightguide Coupling Grating for Single Incidence Direction

Abstract


Coupling of light into a lightguide is of major interest for various applications in modern optics. In VirtualLab Fusion, with the Fourier modal method (FMM, also known as RCWA) and parametric optimization tools, one can optimize the real grating geometries so to achieve best coupling efficiencies for specific diffraction orders. This example shows the design strategy for optimizing a rectangular grating for one specific incidence direction to obtain the optimum lightguide coupling efficiency.

VirtualLab Fusion Configuration

  • VirtualLab Fusion VirtualLab Fusion
  • Grating Package Grating Package

Are you interested in further reading?

Use Case

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This use case demonstrates how to optimize a lightguide with continuously varying fill factor of the gratings in the EPE and outcoupler regions to achieve adequate lateral uniformity in the eyebox.

Tutorial

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Tutorial

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Tutorial

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