109.5 W output 1.94 micron Tm:YAP solid-state laser

Thermal simulation, optical and laser performances of a YAP/Tm:YAP/YAP composite crystal operated at 1.94 μm

“…After thermal bonding, the maximum average output power and slope efficiency are increased by 28.4% and 21.0%, respectively. The slope efficiency of 49.5% for this composite crystal is higher than those of 26.4% 12 and 45.8%, 18 and lower than that of 53.9%, 19 respectively. The result indicates that the thermal bonding method can effectively decrease the thermal effect generated in the laser operation, which is beneficial to improve the laser output power and efficiency of the 1.94 μm NIR laser.…”

“…12 Yuan et al achieved a 109.5 W laser at 1.94 μm on a b-cut ( Pbnm , b = 5.314 Å) YAP/Tm:YAP/YAP composite crystal, corresponding to a slope efficiency of 45.8%. 18 Li et al reported a Tm:YAP/YAP composite laser crystal boule with a diameter of more than 40 mm directly grown by the Cz method, and a 42.8 W laser with a slope efficiency of 53.9% was realized on the single-end bonded crystal element. 19 However, the high hardness and anisotropy of YAP crystals make it very difficult to be thermally bonded.…”

Research on the Thermal Effect of Micro-Channel Cooled Thin-Slab Tm:YAP Lasers

“…In 2019, Yuan et al showed a dual-end-pumped b-cut YAP/Tm:YAP/YAP composite crystal rod laser. The maximum output power of 109.5 W was obtained with an optical-to-optical efficiency of 36.3% [11].…”