In this work, the design and optimization of compact taper is presented to enable coupling of infrared light in the C-band with the nano-photonic silicon-on-insulator (SOI) integrated optical waveguide. The proposed compact taper results in ∼96% transmission efficiency for the taper length of ∼5 µm and ∼99.5% transmission efficiency for the taper length of 10 µm. The use of the proposed compact taper significantly reduces the foot print of optical coupler (grating and proposed compact taper) to (10 × 5) µm2 with ∼96% transmittance and (10 × 10) µm2 with ∼99.5% transmittance. The end-to-end coupling loss is less than 0.01 dB in the C-band. The compact taper along with grating presented in this work can be used as an efficient optical coupler for mode coupling from fibre to SOI single-mode optical waveguide in high density optical integrated circuits operating at 1550 nm.

中文翻译：

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用于 C 波段 SOI 波导模式耦合的紧凑锥度和光栅的建模、设计和优化

在这项工作中，提出了紧凑锥形的设计和优化，以实现 C 波段中的红外光与纳米光子绝缘体上硅 (SOI) 集成光波导的耦合。所提出的紧凑锥度导致约 5 µm 锥度长度的约 96% 传输效率和 10 µm 锥度长度的约 99.5% 传输效率。所提出的紧凑锥度的使用显着减少了光耦合器（光栅和所提出的紧凑锥度）的占用空间，达到（10×5）μm2，透光率约96％，（10×10）μm2，透光率约99.5％。C波段的端到端耦合损耗小于0.01 dB。