Optimizing the trajectories of freeform waveguides using a modal theory

Maria Paszkiewicz-Idzik; Mariia Sukhova; Willy Dörfler; Carsten Rockstuhl

doi:10.1117/12.3026911

2 October 2024 Optimizing the trajectories of freeform waveguides using a modal theory

Maria Paszkiewicz-Idzik, Mariia Sukhova, Willy Dörfler, Carsten Rockstuhl

Author Affiliations +

Proceedings Volume 13129, Optical Modeling and Performance Predictions XIV; 1312903 (2024) https://doi.org/10.1117/12.3026911
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

Freeform dielectric waveguides connect optical chips made of different materials in fully integrated photonic devices. With a spatial extent in the order of hundred micrometers, they constitute a computational challenge and make Maxwell full-wave solvers unhandy for the accelerated design. Therefore, we need tools for the fast prediction of waveguide transmission to enable the rapid optimization of waveguide trajectories. Previously developed methods rely on the assumption that only a fundamental mode propagates in the waveguide. However, the propagation of higher-order modes is not just unavoidable due to the geometry of the waveguides but also, sometimes, beneficial as it increases the number of channels to transmit information. We present approximation methods for the fast calculation of transmission that accommodates the presence of higher-order waveguide modes. We also show the application of the approximation methods to optimize waveguide trajectories given their input and output ports, and the obstacles to be avoided.

Conference Presentation

Citation Download Citation

Maria Paszkiewicz-Idzik, Mariia Sukhova, Willy Dörfler, and Carsten Rockstuhl "Optimizing the trajectories of freeform waveguides using a modal theory", Proc. SPIE 13129, Optical Modeling and Performance Predictions XIV, 1312903 (2 October 2024); https://doi.org/10.1117/12.3026911

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