In the image below, there is a curve-shaped conduit which transmits solar light. The light is collected at different spots and injected into the conduit at various spots with fiber optics.
As per energy conservation, will the final beam have power equal to the sum of the power of all incoming beams? Any other observations?
Similar phenomenon takes place in "atmospheric ducts" where solar light is trapped and directed along a curved duct.
Can this be done with some cavity/solid-state device on a small scale?