Thi Thanh, Thuy Tran, Tan Hung Nguyen, and Dung Truong Cao. 2026. “Design and Optimisation of a Cascaded RI-MMI-Based 2×4 Quadrature Phase and Power Splitter With Integrated Thermo-Optic Phase Shifters”. Opto-Electronics Review 33 (4):e157330 . https://doi.org/10.24425/opelre.2025.157330.