Diode-pumped Nd:YAG laser producing 122-W CW power at 1.319 Μm

摘要

A high-power diode-pumped Nd:YAG laser oscillating at a wavelengthnof 1.319 Μm is reported. A 122-W CW laser beam with an M2 factor ofn35 has been achieved with an optical efficiency of 19.6%. The lasingncharacteristics, including thermal lensing, at 1.319 Μm are comparednwith those at 1.06 Μm. Under lasing conditions, the focal length ofnthermal lensing at 1.319 Μm decreases by 25% and increases by 15% atn1.06 Μm with respect to the nonlasing conditions. Based on thenexperimental results, the heat dissipation in an Nd:YAG rod is discussednwith reference to nonradiative transitions from the upper laser level