High-efficiency high-power QCW diode-side-pumped zigzag Nd:YAG ceramic slab laser

High power and high beam quality quasi-continuous-wave pumped slab laser

“…This can significantly reduce the thermal depolarization effect and thermal birefringence effect, thereby reducing the impact on beam quality. The laser propagates along the Zigzag optical path in the slab [17], which can largely eliminate the thermal distortion effect caused by the temperature gradient in the thickness direction of the slab, weaken the thermo-optic effect caused by the temperature gradient along the direction of pump light propagation, and fully extract the energy stored in the upper level of the gain crystal.…”

6.2 kW quasi-continuous-wave diode-pumped Yb:YAG ceramic slab laser

“…Therefore, most of the researchers focused on the ceramic slab to achieve high power laser output. With a quasi-continuous-wave (QCW) diode-side-pumped Nd:YAG ceramic laser, a laser output power of 2.44 kW with optical-to-optical efficiency of 36.5% was reported [9]. In another work [10], under a total pump power of 18.06 kW, the output power of 7.08 kW was extracted in a double-pass laser amplifier with a composite Nd:YAG ceramic slab, the optical conversion efficiency was 39.2%.…”

82 kW high beam quality quasi-continuous-wave face-pumped Nd:YAG slab amplifier

“…Most of the high beam quality lasers operated at average power less than few hundred watts [7][8][9]. However, after reaching the average power level between several hundred watts to a few kilowatts, it was difficult to obtain a QCW laser with good beam quality from a simple oscillator configuration due to the thermal effects for solid-state lasers, and the thermal and nonlinear optical effects for fiber lasers [10][11][12][13].…”