Fabrication and characterization of Ge–Ga–Sb–S glass microsphere lasers operating at

Yang Kun¹, Dai Shixun^{1, 2}, Wu Yuehao^{1, 2, †}, Nie Qiuhua^{1, 2, ‡}

(color online) Relationship between the output laser power and the absorbed pump power obtained with a 258.64- -diameter microsphere. The inset shows spectral measurements of the coupling system when the pump powers are 0.322 mW (black curve) and 0.383 mW (red curve). (b) Multi-mode microsphere laser obtained when the pump power increases to 0.712 mW.