[en] An experimental demonstration of laser-diode end-pumped Yb:YAG slab output characteristics when using a compact positive confocal unstable–stable hybrid resonator at room temperature is presented. At the absorbed pump power of 650 W, the maximum output power of 205 W at 1030 nm is obtained with a stability of 0.58%. The optical-to-optical efficiency and slope efficiency with respect to the pump power are 31.5% and 45.6%, respectively. At the output power of 190 W, the beam quality M ² factors in the unstable direction and stable direction are 1.05 and 1.89, respectively. (paper)

[en] 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. (paper)

[en] We reported a compact and efficient Nd:YVO_4 partially end-pumped slab (Innoslab) nanosecond amplifier. The power of the seed was 5 W at a pulse repetition rate of 30 kHz with beam quality factors of M "2  <  1.3. A plane–plane cavity was used in the amplifier for high efficiency. With effective shaping of the seed laser, the output of 77 W was obtained under the pump power of 378 W without self-excitation. The optical to optical conversion efficiency was 23.8%, and the beam quality factors of M "2 were 1.52 and 1.32 in the horizontal direction and in the vertical direction, respectively. (paper)

[en] We present a high power 340 W Nd:YVO₄ Innoslab laser end-pumped by 880 nm laser-diode stacks. A maximum output power of 340 W was obtained at the absorbed power of 710 W with optical conversion efficiency up to 47.9 %. At the output power of 300 W, the M² factors in the unstable direction and the stable direction were 2.1 and 3.4, respectively. (letter)