Dual-wavelength laser source by spectral beam combining of two Nd:YAG pulse lasers.

We present a dual-wavelength laser source obtained by spectral beam combining of two solid-state Nd:YAG pulsed lasers. The central wavelengths were locked at 1061.5 and 1064.

Measurement of absorption cross sections of Co:MgAlO crystals with transition of Co ions along two orthogonal directions.

The nonlinear transmission curves of the : crystal at 1.5 µm are experimentally measured by the pump-probe technique. The measurement results demonstrate that the transition into the near-infrared absorption band is polarized not only along the local symmetry axis, but also along the direction perpendicular to the axis, arising from the distortion of oxygen tetrahedrons about the ions along the four local symmetry axes.