Cascaded-mode interferometer (multimodal light manipulator) could replace beam-splitting waveguides for fiber optics
"single waveguide on silicon-on-insulator platform creating multiple signal paths simultaneously controlling light amplitude/ phase (optical spectral shaping) in 1 compact package... etched nanoscale gratings controlling energy exchange affecting frequency/ color, intensity... light moves in different patterns or transverse modes... enables precise, sharp color lines, light waves with distinct features... modulating/ switching fiber-optic light signals, nanophotonic gas sensors, optical on-chip quantum computing"