A novel ytterbium-thulium codoping scheme is presented taking advantage of the fact that ytterbium codoping in thulium could facilitate population inversion between the relevant energy levels, through a cross energy transfer process between Tm3+ and Yb3+. A set of nonlinear coupled ODEs which govern the dynamics of optical amplication in the ytterbium-thulium codoped material system was established based on the rate equations and propagation equations. The results demonstrated that the ytterbium to thulium energy transfer process is significant and beneficial.

PIERS 2005 Progress in Electromagnetics Research Symposium; Hangzhou, China