High-intensity spatial-mode steerable nonlinear frequency up-converter toward on-chip integration

https://phys.org/news/2024-05-high-intensity-spatial-mode-steerable.html

"controlled tuning temperature, wavelengths, intensity... inter-mode phase matching optical waveguide principle... photolithography forming structure inversion, precise cutting, fabricated periodically poled lithium niobate multi-mode waveguides... 976 nm DFB laser pump light and C-band tunable narrow linewidth fiber laser as signal, high-intensity outputs between TM01, TM10, and TM00 modes achieved... high-dimensional quantum entanglement devices, large-capacity mode-division multiplexing devices"