Abstract
Silicon-on-Insulator (SoI) based 1 × 2 3-dB wavelength independent optical power splitter is designed which consist of three parallel cuboidal waveguides of rectangular cross-sectional area. Input power, that is to be split, is injected at the central cuboid, also called primary waveguide. Split output taken from the ports defined at the other end of secondary cuboids, known as secondary waveguides. Output power in each secondary waveguide, is nearly 45% of the total injected power. A theoretical model is built to investigate the normalized power flux in primary and secondary waveguides mathematically. The theoretical model is justified by the achieved simulation results using Finite Element Method (FEM). The width of the rectangular cross-section of primary and secondary waveguide is optimized, considering confinement factor and mode effective area. This is followed by optimization of the gap between primary and secondary cuboidal waveguides and evaluation of optimum longitudinal length of primary waveguide for 3 dB splitting application. The proposed design for 3 dB splitting is wavelength independent which is a valuable property for optical devices. Moreover, the design excludes any bending or tampering of the cuboidal waveguides, thereby avoiding any scope of bending loss. This, consequently, reduces the net loss associated with the splitter design.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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This work has been carried out in Netaji Subhas University of Technology, Delhi.
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Devansh Srivastava and Shalini Vardhan: Performed simulations, Data collection, Data curation, Writing - Original draft. Ritu Raj Singh: Conceptualization, Review and Editing.
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Srivastava, D., Vardhan, S. & Singh, R.R. SoI Based Optical 1 × 2 Wavelength Independent 3-dB Power Splitter Design Using Three Rectangular Cross-Sectional Cuboidal Waveguides. Silicon 15, 1381–1391 (2023). https://doi.org/10.1007/s12633-022-02105-8
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DOI: https://doi.org/10.1007/s12633-022-02105-8