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High-efficiency broad-bandwidth subwavelength grating-based fiber-chip coupler in silicon-on-insulator

机译:绝缘体上硅的高效宽带,基于亚波长光栅的光纤芯片耦合器

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摘要

We report a comprehensive study on the performance of uniform and nonuniform-based subwavelength grating couplers in a silicon-on-insulator. The two performance metrics, coupling efficiency, bandwidth enhancement, and tradeoffs are presented. We also present design parameters to achieve high-efficiency and broadband operation based on the detailed study of various loss mechanisms in the grating. Based on a detailed analysis, subwavelength grating coupler designs with efficiency as high as 84% with a 1-dB bandwidth of 50-nm and 98% with a 44-nm 1-dB bandwidth is presented.
机译:我们报告了在绝缘体上硅上基于均匀和非均匀亚波长光栅耦合器性能的全面研究。介绍了两个性能指标,即耦合效率,带宽增强和权衡。我们还基于对光栅中各种损耗机制的详细研究,给出了实现高效和宽带操作的设计参数。在详细分析的基础上,提出了亚波长光栅耦合器设计,其50dB的1dB带宽效率高达84%,44nm的1dB带宽效率高达98%。

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