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- Bjurshagen, Stefan, et al.
(author)
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Fluorescence dynamics and rate equations analysis in Er3+,Yb3+ doped double tungstates
- 2006
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In: Applied Optics. - 1559-128X .- 2155-3165. ; 45:19, s. 4715-4725
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Journal article (peer-reviewed)abstract
- The fluorescence dynamics in Er3+ and Yb3+ doped KGd(WO4)(2) and KY(WO4)(2) has been investigated. Lifetimes have been measured for the Yb(F-2(5/2)), Er(I-4(13/2)), and Er(S-4(3/2)) levels around 1, 1.5, and 0.55 mu m, respectively. The Yb(F-2(5/2)) lifetimes show a decreasing trend toward the limiting Er(I-4(11/2)) lifetime with increasing Er-to-Yb concentration ratio, whereas the Er(I-4(13/2)) lifetimes are mostly unaffected by the doping concentrations. A rate equation analysis has been performed to explain the observed behavior and gain is calculated for a continuous-wave laser at 1.53 mu m to find the optimum doping concentrations for high gain.
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- Thilmann, Nicky, et al.
(author)
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Nonlinear refractive indices in undoped and Yb-doped KT(WO4)(2) T=Y, Yb, Gd, Lu crystals
- 2009
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In: 2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum Electronics and Laser Science Conference, CLEO/QELS 2009. - Washington, D.C. : IEEE. - 9781424451845 ; , s. 3045-3046
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Conference paper (peer-reviewed)abstract
- Nonlinear index was investigated in undoped and Yb-doped monoclinic double-tungstates for E parallel to N-m and E parallel to N-p polarized 819 nm light. Anisotropic n(2) with maximum for E parallel to N-m in all investigated compounds is proportional to the rare earth ion polarizability.
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