Scientists unveil all-optical phase conjugation method using diffractive wavefront processing

https://phys.org/news/2024-06-scientists-unveil-optical-phase-conjugation.html

"deep learning optimizes passive diffractive layers processing optical fields with unknown phase distortions, all-optically generating their phase-conjugated counterparts at multiple wavelengths... fast, energy-efficient, compact, scalable... passing light through 3D-printed diffractive layers transforms distorted wavefronts at multiple wavelengths into conjugated ones at speed of light, without  digital computation or active modulation... medical Imaging, optical communication, laser beam focusing, astronomy"

Related: Engineers develop advanced optical computing method for multiplexed data processing and encryption
https://phys.org/news/2024-07-advanced-optical-method-multiplexed-encryption.html