A 200 W Diode-Side-Pumped CW 2 μm Tm: YAG Laser with Water Cooling at 8oC
Applied Physics B
A water-cooled 785 nm diode-side-pumped high-power CW Tm:YAG laser system at 2 μm is reported. 200 W output power is achieved with cooling water running at 8°C. As far as we know, this is the highest output power for a diode-pumped all solid-state 2 μm Tm:YAG laser. The output corresponds to optical-to-optical conversion efficiency of 11.2%, with a slope efficiency of about 22.8%. To make the system structure simple, only deionized water is used as the coolant instead of alcohol- or glycol-water mixture or the liquid nitrogen in the reported high-power Tm rod laser experiments, which were performed at low temperature near the freezing point of water, or even below.
Cao, Dong, Qin-Jun Peng, Shi-Feng Du, J. Xu, Ya-Ding Guo, Jing Yang, Yong Bo, Jing-Yuan Zhang, Da-Fu Cui, Z. Xu.
"A 200 W Diode-Side-Pumped CW 2 μm Tm: YAG Laser with Water Cooling at 8oC."
Applied Physics B, 103 (1): 83-88.