New technique accomplishes precise control of photonic angular momentum

https://phys.org/news/2023-10-technique-precise-photonic-angular-momentum.html

"symmetrical cascading 2 analogous units: TAM (total spin angular and orbital angular momentum)... separator and reverser using unwrappers and correctors... extracting up to 42 TAM modes from photon beam, spatial filter determines which TAM modes to keep and which to block, TAM reverser brings back separated beams to spatial domain... high-speed large-capacity data transmission and high-security photonic encryption systems, high-fidelity photonic computation and processing quantum radar signals"