Reducing loss and crosstalk in two-mode ridge waveguide bend by step-like thickness structuring

Edyta Środa; Jacek Olszewski; Waclaw Urbańczyk

doi:10.1117/12.2621293

25 May 2022 Reducing loss and crosstalk in two-mode ridge waveguide bend by step-like thickness structuring

Edyta Środa, Jacek Olszewski, Waclaw Urbańczyk

Proceedings Volume 12148, Integrated Photonics Platforms II; 121480A (2022) https://doi.org/10.1117/12.2621293
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

We proposed a simple method of reducing bend-related loss and inter-mode crosstalk in two-mode ridge waveguide by step-like thickness structuring of bent section. It is already known that the effect of bend can be compensated by linear variation of the waveguide thickness or effective index, however, fabrication of such waveguides requires complicated technologies, which limits mass applications of such structures. We show that the two-step like structuring of the ridge waveguide thickness is sufficient to significantly reduce pure bending loss, bend-related inter-mode crosstalk and excess loss at the interface between straight and bent waveguides sections. Based on the rigorous numerical simulation conducted using transformation optics formalism, we determined the thickness change required to compensate for bend-induced effects and confirmed effectiveness of the proposed approach.

Conference Presentation

Citation Download Citation

Edyta Środa, Jacek Olszewski, and Waclaw Urbańczyk "Reducing loss and crosstalk in two-mode ridge waveguide bend by step-like thickness structuring", Proc. SPIE 12148, Integrated Photonics Platforms II, 121480A (25 May 2022); https://doi.org/10.1117/12.2621293

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