Waveguide-integrated graphene spatial mode filters for on-chip mode-division multiplexing
Waveguide-integrated graphene spatial mode filters for on-chip mode-division multiplexing
复制标题
用于片上模分复用的波导集成石墨烯空间模式滤波器
DOI：
10.1364/oe.27.019188
复制
发表时间：
2019-07-08
期刊：
影响因子：
3.8
通讯作者：
Liu, Tiegen
中科院分区：
文献类型：
--
作者：
Xing, Zhenkun;Li, Chuan;Liu, Tiegen
片上模分复用（MDM）作为一种有前途的扩展通信带宽的方法，由于在从芯片内到板对板通信的光互连中的潜在应用而引起了极大的关注。然而，MDM 技术通常会因多模波导器件中空间模式之间的串扰而遭受信号衰减。在这里，我们为片上 MDM 设计了波导集成石墨烯空间模式滤波器，以克服这一限制。具体来说，TE1模通滤波器和TE2模通滤波器是基于不同的波导架构而设计的。对于 TE1 模通滤波器，我们在 200 μm 长的波导中获得了 9.19 dB 的最大 TE1 至 TE0 模态消光比 (ER)。而对于 TE2 模通滤波器，我们在 200 μm 长的波导中实现了 5.37 dB 的最大 TE2 到 TE1 模态 ER 和 6.44 dB 的 TE2 到 TE0 模态 ER。我们的研究有助于提高片上 MDM 光学互连的信噪比。 (c) 2019 年美国光学协会根据 OSA 开放获取出版协议的条款
On-chip mode-division multiplexing (MDM), as a promising method of scaling communication bandwidth, has attracted tremendous attention due to potential applications in optical interconnects ranging from intra-chip to board-to-board communications. However, the MDM technique usually suffers from signal degradation due to crosstalk between spatial modes in multimode waveguide devices. Here we design waveguide-integrated graphene spatial mode filters for on-chip MDM to overcome this limitation. Specifically, TE1-mode-pass and TE2-mode-pass filters are designed based on different waveguide architectures. For the TE1-mode-pass filters, we have obtained a maximum TE1-to-TE0 modal extinction ratio (ER) of 9.19 dB in a 200-mu m-long waveguide. While, for the TE2-mode-pass filters, we have achieved a maximum TE2-to-TE1 modal ER of 5.37 dB and TE2-to-TE0 modal ER of 6.44 dB in a 200-mu m-long waveguide. Our study could help improve the signal-to-noise ratio for on-chip MDM optical interconnects. (c) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement