Growth and spectroscopic investigations of CEOnew crystal Er 3+Ce3+:NaLa(MoO4)2 promising for 1.5 µm solid-state lasers

Year: 2006

Authors: Subbotin K. A., Lis D. A., Sani E., Toncelli A., Tonelli M., Smirnov V. A., Zharikov E. V.

Autors Affiliation: D. Mendeleyev University of Chemical Technology of Russia, Miusskaya Square 9, Moscow, 125047 Russia;
National Enterprise for Nanoscience and Nanotechnology (NEST) and Dipartimento di Fisica dell’Universita’di Pisa, Largo Pontecorvo, 3-56127 Pisa, Italy;
General Physics Institute of Russian Academy of Sciences, Vavilova Street 38 “D,” Moscow, 119991 Russia

Abstract: Scheelite-like disordered double sodium-lanthanum molybdate NaLa(MoO 4)2 single crystals co-doped with Er3+ and different concentrations of Ce3+ have been grown by Czochralski technique. The 300K spectroscopic properties of the excited states 4S3/2, 4I11/2and 4I 13/2 of Er3+ ions in grown crystals as a function of Cerium concentration have been investigated. The lifetime of 4I 11/2 have been found to reduce from 130 µs in the solely Erdoped sample to approximately 3.5 µs, when the concentration of Ce reaches 50 at. %. At the same time the lifetime of 4I13/2 level at 300 K remains unchanged (3.7 ms) up to the concentration of Ce in crystal equal to 10 at. %, and reduces by less than 30% (2.6 ms) in the 50 at. % Ce co-doped sample. This result looks very promising from point of view of obtaining low-threshold 1.5 µm laser oscillation.

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KeyWords: Crystal growth from melt; Doping (additives); Electron energy levels; Positive ions; Sodium compounds; Solid state lasers; Spectroscopic analysis, Cerium concentration; Czochralski technique; Laser oscillation; Sodium-lanthanum molybdate, Single crystals
DOI: 10.1117/12.677044

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