Diode-pumped laser operation of segmented grown Yb³⁺: YAl₃(BO₃)₄/YAl₃(BO₃)₄composite

Abstract

An Yb3+ : YAl3(BO3)4/YAl3(BO3)4 composite is obtained by the segmented crystal growth method. Diode-pumped laser operation is demonstrated in the 2.0 mm thick, (0 0 1)-oriented composite with a 0.8 mm thick, 9.5 at% Yb3+ : YAl3(BO3)4 crystal segment. Under the absorbed pump power of 11.9 W, quasi-continuous-wave output powers of 0.82 W with a slope efficiency of nearly 20% and of 0.3 W with a slope efficiency of 10.5% around 1040 nm are achieved in hemispherical and plano–plano cavities, respectively.