Investigation of adjoint method inverse design applied to photonic integrated circuit fiber-to-chip edge couplers

Bernard M. Melus; Joseph S. Suelzer; Matt Hagedon; Ronald M. Reano

doi:10.1117/12.3001211

11 March 2024 Investigation of adjoint method inverse design applied to photonic integrated circuit fiber-to-chip edge couplers

Bernard M. Melus, Joseph S. Suelzer, Matt Hagedon, Ronald M. Reano

Author Affiliations +

Proceedings Volume 12892, Optical Interconnects XXIV; 1289208 (2024) https://doi.org/10.1117/12.3001211
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Inverse width taper edge couplers are the staple of low-loss photonic fiber-to-chip coupling. However, adiabatic mode conversion consumes large die area, which contradicts efforts towards dense integration. By leveraging the advantages of inverse design, we analyze a lithographically manufacturable method for designing fiber-to-chip edge coupling components. Adjoint method optimization is executed via the open-source Stanford Photonic Inverse design Software (SPINS-b) optimization framework to design a preliminary silicon nitride (SiN) fiber-to-chip coupler. Simulation results are validated with Ansys Lumerical finite-difference time-domain (FDTD) solver. Adjoint method inverse design in-plane coupling is evaluated as a solution for photonic integrated circuits with strict size constraints. The design methodology is material and application agnostic, promoting dense photonic integration.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Bernard M. Melus, Joseph S. Suelzer, Matt Hagedon, and Ronald M. Reano "Investigation of adjoint method inverse design applied to photonic integrated circuit fiber-to-chip edge couplers", Proc. SPIE 12892, Optical Interconnects XXIV, 1289208 (11 March 2024); https://doi.org/10.1117/12.3001211

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