>300 W laser-diode dual-end-pumped Nd:YVO₄ Innoslab laser

We demonstrate a continuous wave neodymium-doped vanadate (Nd:YVO₄) experiment with the laser diode dual end pumped directly in the band at 880 nm. Due to the advantage of the Innoslab laser, a 22 mm × 10 mm × 1 mm Nd:YVO₄ crystal was used. By using a positive confocal unstable-stable hybrid fold resonator, a maximum power of 330 W was obtained at the absorbed pump power of 725 W. The corresponding optical-to-optical efficiency and slope efficiency were 45.5% and 55.8%, respectively. At an output power of 300 W, the beam quality factors M ² in the unstable direction and stable direction were 1.7 and 2.1, respectively.