Infrared fluorescence spectra of Nd3+ sites in gadolinium gallium garnet:Nd and gadolinium gallium garnet:Nd,Cr
- 15 December 1992
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 72 (12), 5876-5880
- https://doi.org/10.1063/1.351893
Abstract
The fluorescence (excitation and emission) spectra of Nd3+ ions in gadolinium gallium garnet (GGG):Nd and GGG:Nd,Cr have been investigated in the spectral region of laser interest, 4F3/2→4I11/2 transitions. Four sites, denoted as α, β, γ, and δ are present in GGG:Nd, while two additional sites, ε and ζ, appear in GGG:Nd,Cr crystals. Site selective excitation (by using a Ti‐sapphire laser) has permitted to obtain the energy level values for each Nd3+ site. This information is necessary for making lasers with these materials. Thus, it has been determined that the γ site is the responsible for laser action in the GGG:Nd minilasers.Keywords
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