公开(公告)号：US20250164696A1

公开(公告)日：2025-05-22

申请号：US18515037

申请日：2023-11-20

Applicant: XILINX, INC.

Inventor： Robert PARSONS ,  Chuan XIE ,  Mayank RAJ

IPC: G02B6/293

Abstract: Embodiments herein describe a method for selectively filtering different wavelengths of optical signals received from an optical channel using cascaded ring resonators, each of the cascaded ring resonators having a first ring and a second ring. The first ring has a varying waveguide width along its length configured to form a first waveguide width portion and a second waveguide width portion, the first waveguide width portion having a greater width than the second waveguide width portion. The second ring has a varying waveguide width along its length configured to form a third waveguide width portion and a fourth waveguide width portion, the fourth waveguide width portion having a greater width than the third waveguide width portion. The method further connects receivers to respective cascaded ring resonators, each of the receivers having a photodetector configured to differentiate between the optical signals.