Optimization of Preparation and Spectral Performance of Yb3+-Doped Locally Disordered Li2Gd4(MoO4)7 Crystal for Tunable and Femtosecond Laser Applications

Abstract

Through the improvements of the crystal growth conditions and environments, a crack-free 5.65 at. % Yb³⁺:Li₂Gd₄(MoO₄)₇ crystal has been successfully grown by the Czochralski method. The detailed XRD pattern of Li₂Gd₄(MoO₄)₇ has been presented for the first time. Optical absorption, emission and fluorescence decay measurements have been carried out at room temperature. The spectroscopic parameters of the 5.65 at. % Yb³⁺:Li₂Gd₄(MoO₄)₇ crystal are compared with those of the 3.2 at. % one reported previously. The results indicate that the crystal with high doping level is a more promising laser gain medium for tunable and femosecond laser systems.