We present a 120-W cw diode-pumped Tm:YAG laser. The Tm:YAG rod is side pumped by three diode arrays whose radiation is coupled through compound parabolic concentrators. The maximum optical-to-optical conversion efficiency of the 2.02-<i>μ</i>m laser output is 25.2%, with a slope efficiency of 31.2%.
© 2000 Optical Society of America
K. S. Lai, P. B. Phua, R. F. Wu, Y. L. Lim, Ernest Lau, S. W. Toh, B. T. Toh, and Audrey Chng, "120-W continuous-wave diode-pumped Tm:YAG laser," Opt. Lett. 25, 1591-1593 (2000)