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首页> 外文期刊>Journal of Lightwave Technology >2-D taper for low-loss coupling between polarization-insensitive microwaveguides and single-mode optical fibers
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2-D taper for low-loss coupling between polarization-insensitive microwaveguides and single-mode optical fibers

机译:二维锥度,用于偏振不敏感的微波波导和单模光纤之间的低损耗耦合

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摘要

This paper reports modeling and simulation of low-loss coupling between polarization-insensitive silicon-on-insulator (SOI) microwaveguides and single-mode optical fiber, using a two-dimensional taper. The proposed structure is a reduction of both sizes of a square-strip waveguide from a 350/spl times/350-nm/sup 2/ cross section to about 155/spl times/155-nm/sup 2/ cross section. At the output facet, the guided mode is spread out and has a non-Gaussian profile, but low-loss coupling can be achieved by optimizing the overlap integral between the submicrometer waveguide mode and the optical fiber one. The calculated coupling losses are lower than 0.2 dB, the alignment tolerance is larger than 4 /spl mu/m at /spl plusmn/1 dB for the coupling losses, and the total length is about 10 /spl mu/m.
机译:本文使用二维锥度报告了偏振不敏感绝缘体上硅(SOI)微波波导和单模光纤之间的低损耗耦合建模和仿真。所提出的结构是将方形带状波导的两种尺寸都从350 / spl次/ 350-nm / sup 2 /截面减小到大约155 / spl次/ 155-nm / sup 2 /截面。在输出面上,引导模式展开并具有非高斯分布,但是可以通过优化亚微米波导模式与光纤模式之间的重叠积分来实现低损耗耦合。计算出的耦合损耗低于0.2 dB,对准损耗在/ spl plusmn / 1 dB时,对准公差大于4 / spl mu / m,总长度约为10 / spl mu / m。

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