With a laser-diode (LD) as the pump source, continuous-wave (cw) laser performance at 1.33 µm of Nd:CNGG and Nd:CLNGG crystals was demonstrated for the first time. The maximum power of 158 mW and 141 mW from Nd:CNGG and Nd:CLNGG lasers were obtained with the corresponding optical conversion efficiencies of 1.3% and 1.5%, and slope efficiencies of 2.0% and 2.9%, respectively. The difference between the laser performance of Nd:CNGG and Nd:CLNGG crystals was also discussed.Intensity, a.u.

Laser-diode pumped continuous-wave (cw) laser performance of a new class Nd:LuxGd1-xVO4 crystals at 1.34 μm was demonstrated for the first time to our knowledge. A maximum output power of 2.25 W was obtained at the incident pump power of 11.96 W with x = 0.14, giving the corresponding optical conversion efficiency of 18.8%. Efficient emission cross-sections of the mixed crystals were calculated for different x. The influence of Lu composition x on the variations of laser performance and emission cross-section was also discussed.

We report on the first observation of stimulated Raman scattering (SRS) effects in tetragonal crystals of SrGdGa 3 O 7 and SrLaGa 3 O 7, known as host crystals for Ln 3+ -lasant ions. All recorded Raman-induced spectral lines were identified and attributed to the promoting χ (3) -vibrational modes of these gallates. Steady-state Raman gain coefficients for first Stokes generation were estimated. A short review of known simultaneous SRS-and Ln 3+ -laser active melilite-type crystals is given as well.

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A high-quality Nd3+ and Mg2+ co-doped LiTaO3 (Nd:MgO:LT) crystal was grown by the Czochralski method. The polarized absorption spectra and fluorescence spectra were studied, and the absorption cross section was calculated by Judd–Ofelt (J–O) theory. The laser performance with different sample cuts of the crystal was investigated for the first time, and it was found that Nd:MgO:LT crystal with different cutting directions (a and c) exhibits different laser properties. By optimizing a partial reflectivity mirror in the laser experimental setting, a high continuous wave output power of 3.58 W was obtained at 1092 and 1076 nm with an optical-to-optical conversion efficiency of 22.78% and slope efficiency of 26.06%. The results indicate that Nd:MgO:LT crystal is a promising candidate for the manufacture of Nd3+ doped periodically poled MgO:LiTaO3 crystal (Nd:PPMgOLT), which should have considerable applications in self-frequency doubling and optical parametric oscillation laser devices.