摘要
Free-running emerald laser pumped by 660-nm laser diode （LD） was reported. Free-running output power of 24 mW has been obtained with overall efficiency of 1.4% and slope efficiency of 11.9% when the LD incident power was 2.56 W. The laser threshold value of emerald crystal was estimated to be 0.7 W. OCIS codes： 140.3580, 140.3070.
Free-running emerald laser pumped by 660-nm laser diode （LD） was reported. Free-running output power of 24 mW has been obtained with overall efficiency of 1.4% and slope efficiency of 11.9% when the LD incident power was 2.56 W. The laser threshold value of emerald crystal was estimated to be 0.7 W. OCIS codes： 140.3580, 140.3070.
基金
This work was supported by the Natural Science Foundation of China (No. 60278025).
