2025 · 11·IEEE Photonics Conference (IPC)·Singapore

Inverse-designed silicon nitride wavelength demultiplexers bridging the visible and telecom bands

A. Sun, Y. Yuan, J. Hu, et al.
Fudan University

Proceedings Scholar Related work
TL;DR Two compact (6 × 8 µm²) silicon-nitride wavelength demultiplexers, inverse-designed to bridge the 600/1550 nm and 600/1310 nm bands — the first deMUXes directly connecting the visible and telecom regimes. Insertion loss is below 0.75 / 0.68 dB and crosstalk below −18.6 / −20.6 dB at the centre wavelengths, with an 80 nm minimum feature size.
inverse designwavelength demultiplexingsilicon photonics
SiN visible-to-telecom WDM
First page of the paper. Follow the DOI above for the published version.

Highlights

  • First SiN deMUXes bridging visible and telecom bands (600/1550 nm and 600/1310 nm)
  • Compact 6 × 8 µm² footprint; 80 nm minimum feature on a 350 nm SiN platform
  • Visible/C-band IL 0.35/0.75 dB (CT −18.6/−21.1 dB); visible/O-band IL 0.21/0.68 dB (CT −20.6/−23.4 dB)
  • Edge-guided analog-and-digital optimization (EG-ADO) extended to multi-band design

Citation

A. Sun et al., "Inverse-designed silicon nitride wavelength demultiplexers bridging the visible and telecom bands," IEEE Photonics Conference (IPC), Singapore, Nov. 2025.