Raman Scattering and Nd$^{3+}$ Laser Operation in NaLa(WO$_{4}$)$_{2}$
2007; IEEE Photonics Society; Volume: 43; Issue: 2 Linguagem: Inglês
10.1109/jqe.2006.886450
ISSN1558-1713
AutoresAlberto Garca-Corts, C. Cascales, A. de Andrés, C. Zaldo, Е. В. Жариков, К. А. Субботин, S. Bjurshagen, Valdas Pašiškevičius, M. Rico,
Tópico(s)Photorefractive and Nonlinear Optics
ResumoThe continuous-wave laser operation of Nd-doped tetragonal NaLa(WO 4 ) 2 crystal is studied at room temperature by optical pumping in the spectral region overlapping AlGaAs diode laser emission. This crystal has inhomogeneously broadened optical bands. From the room-temperature spectroscopic parameters determined it is found that the optimum Nd concentration for the 4 F 3/2 rarr 4 I J laser channels must be in the 3-5 at.% range. For J=11/2 and 13/2 channels (lambdaap1.06 and 1.3 mum) the most favourable polarization configuration is parallel to the crystallographic c axis, while for J=9/2 little polarization dependence of the laser efficiency is predicted. Laser operation was achieved with a 3.35 at.% Nd-doped sample grown by the Czochralski method. The laser operation was tested in an hemispherical optical cavity pumped by a Ti:sapphire laser. Stimulated emission at lambda=1056 nm was achieved for a wide spectral pumping range, lambda=790-820 nm. Stimulated Raman scattering was achieved in the picosecond regime with an efficiency similar to that of monoclinic KY(WO 4 ) 2 reference compound
Referência(s)