3D-BPM simulation design of a compact 3-dB optical power splitter using a 2 × 2 RI-MMI coupler on silicon waveguide

• Autorzy: Thanh Thuy Tran Thi , Trung Hien Nguyen , Nguyen Tan Hung , Cao Dung Truong

Identyfikatory

DOI

10.24425/opelre.2025.155674

• Języki publikacji: EN

Abstrakty

EN

Multimode interference (MMI) waveguides are favoured for their wide bandwidth, extensive fabrication tolerance, high stability, effective light confinement, and minimal transmission loss. In this study, the authors propose a numerical design of an optical power splitter based on restricted interference (RI) mechanisms using silicon-on-insulator waveguides, where the precise positioning of input pairs and subsequent adjustment of the MMI region length are essential aspects. The RI-MMI configuration facilitates the reduction of the MMI length due to the applied interference theory. The authors’ design undergoes a rigorous simulation and optimization using a highly accurate three-dimensional beam propagation method (3D-BPM) simulation method to ensure optimal performance. Simulation results confirm the authors high-performance design with low excess loss (< 2.7 dB), small relative phase difference (< 2%), negligible residual (< -18 dB), excellent coupling ratio (- 0.09 dB to 0.05 dB), and high balance factor (< - 17 dB) across the wide range of 100 nm (1500 nm–1600 nm). Furthermore, the authors’ optimized design exhibits a width tolerance of ± 2.1 μm and a height tolerance of ± 10 nm. Notably, the core component of the splitter is housed within an extremely compact footprint area of 6 μm × 65 μm. These exceptional characteristics position the authors’ proposed device as highly promising for large-scale integrated optical circuits, as well as photonic neural networks in ultrawideband telecom applications.

Słowa kluczowe

EN

3-dB power splitter; restricted interference; MMI coupler; silicon-on-insulator; 3D-BPM simulation; high performance

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2025
• Tom: Vol. 33, No. 3
• Strony: art. no. e155674
• Opis fizyczny: Bibliogr. 39 poz., rys., wykr.

Twórcy

autor

Thanh Thuy Tran Thi

• Faculty of Electronics Engineering 1 & EDA Lab, Posts and Telecommunications Institute of Technology, Hanoi, Vietnam

• https://orcid.org/0000-0003-4226-7750

autor

Trung Hien Nguyen

• Faculty of Postgraduate, Posts and Telecommunications Institute of Technology, Hanoi, Vietnam

autor

Nguyen Tan Hung

• Advanced Institute of Science and Technology-The University of Danang, Danang, Vietnam

autor

Cao Dung Truong

• Faculty of Electronics Engineering 1 & EDA Lab, Posts and Telecommunications Institute of Technology, Hanoi, Vietnam

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).