Compact double-part grating coupler for higher-order mode coupling

• Main Authors: Lai, Yaxiao, Yu, Yu, Fu, Songnian, Xu, Jing, Shum, Perry Ping, Zhang, Xinliang
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Electrical and electronic engineering; Integrated Optics Devices; Waveguides
• Online Access: https://hdl.handle.net/10356/141858
• Institution: Nanyang Technological University

We propose and demonstrate a compact and efficient grating coupler for first-order mode fiber-to-chip coupling. The coupler is configured by a double-part grating structure combined with a curved Y-junction by means of mode diversity. Compared with a traditional grating coupler, the designed structu...