Xing Peng, Ooi Kelvin J A, Tan Dawn T H
Photonic Devices and Systems Group, Singapore University of Technology and Design, 8 Somapah Rd, 487372, Singapore, Singapore.
Sci Rep. 2018 Jun 29;8(1):9874. doi: 10.1038/s41598-018-28076-8.
Increasing bandwidth demands in optical communications necessitates the introduction of mode-division multiplexing (MDM) on top of the existing wavelength-division multiplexing (WDM) systems. Simultaneous management of both multiplexing systems will be a complex task, and there is the possibility of signal degradation through modal crosstalk. Here, we propose graphene-on-silicon (GOS) integrated waveguide mode filters to suppress the propagation of spurious waveguide modes at the telecommunications wavelength. Graphene's high fabrication tolerance potentially enables surgical tailoring and deployment at targeted segments on the waveguide to absorb the undesired TE or TE modes. The proposed GOS waveguide mode filters can potentially improve the performance and reduce the device footprint of MDM systems.
光通信中不断增长的带宽需求使得在现有的波分复用（WDM）系统之上引入模式分割复用（MDM）成为必要。对这两种复用系统进行同时管理将是一项复杂的任务，并且存在通过模式串扰导致信号劣化的可能性。在此，我们提出硅基石墨烯（GOS）集成波导模式滤波器，以抑制电信波长下杂散波导模式的传播。石墨烯的高制造容差有可能实现对波导上目标段进行精确裁剪和部署，以吸收不需要的横电（TE）或横磁（TM）模式。所提出的GOS波导模式滤波器有可能提高MDM系统的性能并减小其器件尺寸。
