General design flow for waveguide Bragg gratings

Frank Brückerhoff-Plückelmann ^1,2, Tim Buskasper ^1,3, Julius Römer ²

⁰Center for NanoTechnology (CeNTech), Heisenbergstr. 11, 48149 Münster, Germany.

Nanophotonics (berlin, Germany) +

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February 19, 2025

View abstract on PubMed

Summary

We present a new simulation and design framework for waveguide Bragg gratings (WBGs). This approach precisely designs WBGs for various layer stacks and wavelengths, overcoming limitations of previous methods.

Area Of Science

Photonics and Optical Engineering
Materials Science

Background

Bragg gratings are essential for photonic signal processing in applications like biosensing and computing.
Designing integrated waveguide Bragg gratings (WBGs) for specific wavelengths is challenging, especially with complex material structures.

Purpose Of The Study

To introduce a general simulation and design framework for waveguide Bragg gratings (WBGs).
To enable precise design and optimization of WBGs for diverse layer stacks and wavelengths.

Main Methods

Combined coupled mode theory with 3D finite-element method (FEM) eigenfrequency computations.
Developed a general framework applicable to various device layer stacks.

Main Results

Achieved precise design and optimization of WBGs across a broad range of device layer stacks.
Demonstrated a design flow applicable to numerous layer stacks and wavelengths.

Conclusions

The developed framework overcomes limitations of traditional approximations for WBGs.
This approach facilitates the design of WBGs for advanced photonic applications.

Keywords:

integrated signal processing photonic longpass filter waveguide Bragg gratings