We present a high power 340 W Nd:YVO 4 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 M 2 factors in the unstable direction and the stable direction were 2.1 and 3.4, respectively.
In this study, a laser diode dual-end-pumped Tm:YLF slab laser has been developed. Without using a Fabry-Pérot etalon or a volume Bragg grating, the emission wavelength was selected by different transmissions of the output coupler. The single emission wavelength of 1908.6 nm (1886.4 nm) is selected by the T = 20% (T = 40%) transmission of the output coupler with an FWHM of approximately 1.36 nm (1.10 nm). The corresponding maximum continuous-wave output power of 213 W (173 W) was acquired. The output power stability is about 0.16% (0.23%) in 30 minutes. The optical-to-optical efficiency and slope efficiency are 35.8% (29%) and 43.7% (37.9%), respectively.
We demonstrate a high-power laser diode stacks double-end-pumped Nd:YVO 4 1064 nm slab laser with a folded stable-unstable hybrid resonator. An output power of 220 W was obtained at the pump power of 490 W with optical conversion efficiency of 44.9%. At the output power of 202 W, the M 2 factors in the unstable direction and in the stable direction were 1.7 and 2.3, respectively.
A compact laser-diode dual-end-pumped 3 at. % a-cut Tm:YAP InnoSlab laser with the output power of 254 W in 1.99 µm has been demonstrated. The slope efficiency with respect to the incident pumped power is 45.9%, and the optical-to-optical conversion efficiency is 36.5%. The RMS stability of the maximum output power is better than 0.1% in 30 min. Beam quality factors
M
2
are 250 in the
x
direction and 4.7 in the
y
direction. Additionally, the shape of the output laser spot is rectangular.
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