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Multiport optical power splitter design based on coupled-mode theory
摘要： We proposed a multiport T-shaped 1 x 8 balanced optical power splitter design based on asymmetric vertical silicon slot waveguides working on the principle of coupled-mode theory (CMT). The scheme of the power splitter is unique which offers strong field confinement of TE-polarized light and delivers the light to four ports each on two opposite side of the chip. By shifting the slot towards the outer sideline of the bend, the bending losses are reduced to 80% as compared to standard symmetric slot waveguide.
关键词： coupled-mode theory,asymmetric vertical silicon slot waveguides,bending losses,TE-polarized light,optical power splitter
更新于2025-09-23 15:19:57
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Zero-Birefringence Silicon Slot Waveguides with L-Rails
摘要： Silicon slot waveguides are widely used for photonic sensing [1] and optical signal procesing [2]. We propose a novel slot formed when a sub-micron rib waveguide is slit with vertical symmetry resulting in L shaped rails to have Zero Birefringence (ZB). This geometry gives the flexibility to choose the slab (strip-load) region for doping or modulation. Index modulation of the slab sidewall offers platform for Bragg gratings with sub-nanometer stop bands [3,4]. We show that slots with L-rails possess better confinement and higher tolerance to sidewall width variations compared to strip-rails [5] and ZB can be achieved by engineering the waveguide geometry. Optimal waveguide-dimensions at a wavelength λ = 1550 nm are designed from modal analysis through full-vectorial computations.
关键词： Zero Birefringence,optical signal processing,Silicon slot waveguides,photonic sensing,L-rails
更新于2025-09-11 14:15:04