带状波导与槽形波导之间的超紧凑型低损耗耦合器。

Ultracompact low-loss coupler between strip and slot waveguides.

作者信息

Wang Zhechao, Zhu Ning, Tang Yongbo, Wosinski Lech, Dai Daoxin, He Sailing

机构信息

JORCEP [Joint Research Center of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang University], Zhejiang University, Hangzhou 310058, China.

出版信息

Opt Lett. 2009 May 15;34(10):1498-500. doi: 10.1364/ol.34.001498.

DOI:10.1364/ol.34.001498

PMID:19448800

Abstract

We present both theoretical and experimental results of an ultracompact waveguide coupler that is capable of highly efficient coupling of light from strip waveguides to slot waveguides, and vice versa. By optimizing the geometrical parameters, it is possible to achieve extremely low-loss coupling. A coupling efficiency of 97% has been obtained experimentally while keeping the overall size down to the range below 10 mum. Further analysis shows that the proposed coupler has relatively high tolerance to fabrication errors and is wavelength insensitive.

摘要

我们展示了一种超紧凑型波导耦合器的理论和实验结果，该耦合器能够实现光在条形波导和槽形波导之间的高效耦合，反之亦然。通过优化几何参数，可以实现极低损耗的耦合。实验获得了97%的耦合效率，同时将整体尺寸缩小到10微米以下的范围。进一步分析表明，所提出的耦合器对制造误差具有较高的容忍度，并且对波长不敏感。