Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster – Photonics

Q 40.23: Poster

Mittwoch, 4. März 2026, 17:00–19:00, Philo 1. OG

Simulation of light guiding and coupling in direct laser-written integrated optical elements — •Veronica Montoya, Thilo Danner, Patrick Hildebrand, Yassin Nasr, Andreas Michalowski, and Tobias Menold — Universität Stuttgart, Institut für Strahlwerkzeuge (IFSW), Pfaffenwaldring 43, 70569 Stuttgart

The trend to construct on-chip three-dimensional devices is growing, and direct laser-written structures (DLW) in glass represent a versatile key technology for integrated photonic systems. Major challenges lie in the currently insufficient theoretical understanding of the influence of the resulting refractive index profiles of DLW waveguides, as well as in the development of scalable and robust light coupling between a waveguide and other integrated optical element. Therefore, simulation-based preliminary work is essential. The goal of this project is to analyze and optimize the light-guiding behavior and coupling properties of DLW waveguides and coupling structures using simulation tools such as Ansys Lumerical. A realistic implementation of the refractive index profile resulting from DLW, along with the resulting mode structure, losses, and coupling functionality facilitated by Ansys' time, space, and frequency solutions, can provide the foundation for the targeted design of complex structures in the future.

Keywords: Optics simulation; Femtosecond-laser writing; Fused silica; Photonic integrated circuits