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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 19 — Jul. 1, 2006
  • pp: 4715–4725

Fluorescence dynamics and rate equation analysis in Er3+ and Yb3+ doped double tungstates

Stefan Bjurshagen, Jonas E. Hellström, Valdas Pasiskevicius, Maria Cinta Pujol, Magdalena Aguiló, and Francesc Díaz  »View Author Affiliations


Applied Optics, Vol. 45, Issue 19, pp. 4715-4725 (2006)
http://dx.doi.org/10.1364/AO.45.004715


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Abstract

The fluorescence dynamics in Er 3 + and Yb 3 + doped KGd(WO4)2 and KY(WO4)2 has been investigated. Lifetimes have been measured for the Yb   ( 2 F 5 / 2 ) , Er   ( 4 I 13 / 2 ) , and Er   ( 4 S 3 / 2 ) levels around 1, 1.5, and 0.55 μ m , respectively. The Yb   ( 2 F 5 / 2 ) lifetimes show a decreasing trend toward the limiting Er   ( 4 I 11 / 2 ) lifetime with increasing Er-to-Yb concentration ratio, whereas the Er   ( 4 I 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 μ m to find the optimum doping concentrations for high gain.

© 2006 Optical Society of America

OCIS Codes
(160.3380) Materials : Laser materials
(190.7220) Nonlinear optics : Upconversion
(260.2160) Physical optics : Energy transfer

History
Original Manuscript: November 9, 2005
Revised Manuscript: February 21, 2006
Manuscript Accepted: February 23, 2006

Citation
Stefan Bjurshagen, Jonas E. Hellström, Valdas Pasiskevicius, Maria Cinta Pujol, Magdalena Aguiló, and Francesc Díaz, "Fluorescence dynamics and rate equation analysis in Er3+ and Yb3+ doped double tungstates," Appl. Opt. 45, 4715-4725 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-19-4715


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