Interaction between Nd/sup 3+/ and Yb/sub 3+/ ions in epitaxial YAG laser waveguide

In this paper, we have investigated the IR and visible emissions of Yb+Nd:YAG waveguide laser pumped by 810 nm laser diodes and have observed strong amplification of the up-converted Nd emission by Yb presence. We also have analyzed the mechanisms of the energy transfer from Nd to Yb ions for different concentration ratio of Yb/sup 3+//Nd/sup 3+/.