Above 10 W 2130 nm Ho:YAP laser intra-cavity pumped with composite YAP/Tm:YAP laser

Abstract We demonstrated efficient Ho:YAP laser pumped with a composite YAP/Tm:YAP laser intra-cavity, where both Tm-doped and Ho-doped YAP hosts were placed with identical crystallographic orientations. In the composite Tm laser, maximum output power of 18.42 W at 1999 nm, corresponding to a slope efficiency of 46.4% was obtained. In the Ho:YAP laser, maximum output power of 10.6 W at 2130 nm (E//b) for the compact intra-cavity pumped Ho lasers was obtained, to the best of our knowledge, corresponding to a slope efficiency of 25.7%.