Investigation of the spectroscopic properties of Nd3+-doped phosphate glasses

Optical properties of Nd3+-doped phosphate glasses have been studied on the basis of the Judd-Ofelt theory. With the intermediate cross-section value and the weak Omega(4)/Omega(6) parameter, we expect a relatively prominent F-4(3/2) --> I-4(11/2) laser emission. The quenching effect of the emission intensity is discussed in terms of cross-relaxation between the Nd3+ ions as well as energy transfer processes within the host matrix. From the investigation of the decay rate from the 4F3/2 State with the neodymium concentration, we suggest that self-quenching is insured by dipole-dipole interaction. This result was also confirmed by the simulation of the decay with the Inokuti-Hyrayama model.