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This paper reviews the on-chip beam splitting methods in recent years, which are mainly divided into the following categories: y-branch, multimode interference coupling, directional coupling, and inverse design. TE mode can enter the through port through multimode waveguide, while TM mode forms an image at the cross port.
Methods and applications of on-chip beam splitting: A review
They play different roles in wavelength division multiplexing, time division multiplexing, space division multiplexing and other multiplexing systems, so as to meet the growing demand for communication capacity.Ultra-small and fabrication-tolerant silicon polarization beam splitter using sharp bent directional coupler. For example, in reference [ 41], a 1 × 64 cascaded y-branch splitter based on silica-on-silicon material platform for telecommunication applications is proposed. It is a passive optical device with many input and output terminals, especially applicable to PON (EPON, GPON, BPON, FTTX, etc.
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These results will have great application value in the field of optical interconnection and optical communication. An integrable and configurable phononic beam splitter based on self-collimated surface acoustic waves. The ultra-wide band y splitter based on planar terahertz plasma metamaterials [ 42] has similar dispersion relationships and mode characteristics with SPPs.PLC Fiber Optic Splitter can be categorized by the PLC splitter chip they use, meaning there are 1xN and 2xN PLC splitters, such as 1×4 splitter, 1×8 splitter, 1×16 splitter, 2×32 splitter, 2×64 PLC splitters, etc. The products mentioned above are some of the best in the market, offering excellent performance and durability. As one of the most basic integrated optical devices, the y-branch waveguide is composed of one input waveguide and two output waveguides, which can confine photons to the y waveguide for distribution and propogation. Broadband integrated optic polarization splitters by incorporating polarization mode extracting waveguide.