Highly scalable and flexible on-chip all-silicon mode filter using backward mode conversion gratings

• Published in: Optics express Vol. 30; no. 24; p. 43439
• Main Authors: Zhang, Lei, Guo, Zhenzhao, Gu, Xiaofei, Chen, Yufei, San, Xingyuan, Xiao, Jinbiao, Wu, Shengbao
• Format: Journal Article
• Language: English
• Published: United States 21.11.2022

Mode filters are fundamental elements in a mode-division multiplexing (MDM) system for reducing modal cross-talk or realizing modal routing. However, the previously reported silicon mode filters can only filter one specific mode at a time and multiple modes filtering usually needs a cascade of sever...