Laser-Diode End-Pumped Nd:YVO ₄ Slab Laser under Direct Pumping into the Emitting Level

Abstract

We present an 880-nm laser-diode partially end-pumped Nd:YVO4 slab cw laser with output 126.7 W by using a hybrid resonator. The slop efficiency and optical-to-optical efficiency with respect to absorbed pumping power are 73.2% and 58.7%, respectively. At the output power of 100 W, the beam propagation 𝑀 2 factors are 1.1 in the unstable direction and 1.15 in the stable direction.

Epsilon-near-zero indium tin oxide nanocolumns array as a saturable absorber for a Nd:BGO laser

“…Therefore, we used the direct pumping technique at 880 nm to decrease the thermal effect. Compared to the traditional pumping method, the direct pumping technique directly pumps the ground-state electrons into the upper laser energy level, which can effectively diminish the thermal effect caused by the quantum effect, thereby obtaining the lasers with the low threshold power and the high slope efficiency [15][16][17].…”