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Spectroscopy and efficient laser operation near 1.95μm of Tm3+ in disordered NaLu(WO4)2

descriptionPublicationkeyboard_double_arrow_right Article 15 Apr 2008 Spain English Publisher:AIP PublishingJournal:Journal of Applied Physics, volume 103 (issn: 0021-8979, eissn: 1089-7550,

Authors: Han, Xiumei; Cano-Torres, José María; Rico, Mauricio; Cascales, Concepción; Zaldo, Carlos; Mateos, Xavier; Rivier, Simón; +2 Authors

doi: 10.1063/1.2907438

handle: 10261/23950

Spectroscopy and efficient laser operation near 1.95μm of Tm3+ in disordered NaLu(WO4)2

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Abstract

Continuous wave and tunable laser operation at room temperature is demonstrated with single crystals of Tm-doped NaLu(WO4)2. Under Ti:sapphire laser pumping and tuning by an intracavity Lyot filter, the Tm3+ emission extended from 1799to2026nm. The maximum output power exceeded 0.5W and the maximum slope efficiency with respect to the absorbed power was above 58%. These good laser properties are related to the locally disordered tetragonal (I4¯) structure of the crystalline host. Using low temperature spectroscopy and energy level simulation methods, the energy levels and spectroscopic properties of Tm3+ have been shown to be compatible with the S4 site symmetry. This allowed the reliable determination of the emission cross sections related to the laser transitions.

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Spain

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Keywords

CW laser operation, Local Disorder, Tm3+-Doped NaGd(WO4)2, Optical Spectroscopy

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