Eur. Phys. J. AP
Volume 4, Number 3, December 1998
|Page(s)||315 - 321|
|Published online||15 December 1998|
Spectroscopic investigations of Yb3+–Er3+–codoped LaLiP4O12 glasses relevant for laser applications
Université de La Rochelle (LEMMA JE 453), Pôle Sciences et Technologies,
avenue Marillac, 17042 La Rochelle Cedex 01, France
2 ICMCB, avenue du Docteur Schweitzer, 33608 Pessac Cedex, France
3 ISMRA, Université de Caen, LSA (UPRESA 6084 CNRS), 6 boulevard Maréchal Juin, 14050 Caen Cedex, France
4 LPCML, Université Claude Bernard-Lyon (UMR 5620 CNRS), 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
Corresponding author: email@example.com
Revised: 8 September 1998
Accepted: 8 September 1998
Published online: 15 December 1998
Yb3+–Er3+–codoped phosphate glasses have been studied in the context of research for eye-safe laser source near 1540 nm, wavelength corresponding to the 4I13/2→4I15/2 Er3+– transition. Undoped and doped glasses of the composition La2O3–Li2O–P2O5 have been synthesised. Absorption from both the 2F7/2 Yb3+–ground state and the 4I15/2 Er3+–ground state, excited state absorption 4I13/2→4I9/2 Er3+–transition, emission spectra, decay time measurements and Raman scattering have been investigated by using laser spectroscopic techniques. The Judd-Ofelt intensity parameters Ωt (t = 2, 4, 6) for Er3+ have been calculated in order to determine the radiative lifetimes, the branching ratios of the transitions and the line strength of the excited state absorption 4I13/2→4I9/2. A thermal conductivity measurement has also been realised. In this paper, the Mayn spectroscopic properties of Yb3+–Er3+–codoped LaLiP4O12 will be discussed and compared with other Yb3+–Er3+–codoped phosphate glasses.
PACS: 42.70.Hj – Laser materials / 42.62.Fi – Laser spectroscopy / 81.05.Kf – Glasses
© EDP Sciences, 1998
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