Compact, passive polarization and wavelength routers based on deep diffractive neural networks

https://phys.org/news/2024-08-polarization-wavelength-routers-based-diffractive.html

"series of continuous diffractive layers... transmission/ reflection coefficient variations at different positions cause light's phase/ amplitude changes... fast, efficient optical signals... 3 types all-optical routers: (1) routing 2 orthogonally polarized light beams,  (2) routing 1550, 1300, and 1100 nm wavelengths with excellent polarization maintenance, (3) integrates wavelength/ polarization degrees of freedom, handling 6 types of input light, increasing information processing capacity... optical computing, faster internet"