Output characteristics of no gain competition 912 nm and 1064 nm dual-wavelength lasers

Abstract

In this study, based on the intra-cavity pumped dual-wavelength theoretical model, a reabsorption effect is introduced into a quasi-three-level laser, and a new theoretical model of a dual-wavelength laser with reabsorption effect is presented. Through experiments, the output characteristics of no gain competition 912 nm and 1064 nm dual-wavelength lasers with Nd:GdVO4 and Nd:YVO4 are presented for the first time. Results showed that at an incident pumping power of 38.9 W, the total output power was generally higher than at 3.6 W (1.4and 2.2 W at 912 nm and 1064 nm, respectively) and the overall optical-to-optical efficiency was > 17%. The fluctuations in the output powers of the 912 nm and 1064 nm lasers were 1.62 and 2.18%, respectively. However, the fluctuation in the total output power was only 0.28% at a pumping power of 27.7 W. The laser mode was TEM00, and the measured M2 values for 912 nm and 1064 nm lasers were 1.35 and 1.28, respectively, under a pumping power of 30 W.