Growth and optical properties of Co,Nd:LaMgAl11O19

Abstract: Nd,Co:LaMgAl11O19 (abbreviated as Co,Nd:LMA) was grown using the Czochralski method. The structure, polarized absorption spectrum, fluorescence spectrum, and fluorescence decay time were analyzed. The as-grown crystal had very wide absorption bands at 794nm, which can be pumped by GaAs laser diode without temperature stabilization. Two strong emission bands were present at 1056nm and 1082nm with full-width at half-maximum (FWHM) of 6 and 8nm, respectively. The large FWHM is due to the inhomogeneity of the Nd ion sites. The lifetimes of the 4F3/2 manifold of Co,Nd:LMA at room temperature monitored at 905nm, 1056nm, and 1344nm were 292, 288, and 350μs, respectively, which was caused by the different contribution of the three different sites with D3h and C2v symmetry. The absorption band of Co is from 1.3μm to 1.6μm, and Co,Nd:LMA still has a strong emission around the 1.38μm, indicating that the Co,Nd:LMA can be applied as a potential self-Q-switched material operating at 1.3μm. [Copyright &y& Elsevier]