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

AuthorsHan, Xiumei ; Cano-Torres, José María ; Rico, Mauricio ; Cascales, Concepción ; Zaldo, Carlos ; Mateos, Xavier; Rivier, Simón; Griebner, Uwe; Petrov, Valentín
KeywordsTm3+-Doped NaGd(WO4)2
Optical Spectroscopy
Local Disorder
CW laser operation
Issue Date15-Apr-2008
PublisherAmerican Institute of Physics
Citationrnal of Applied Physics 103 (8) : 083110 (2008)
AbstractContinuous 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 1799 to 2026 nm. The maximum output power exceeded 0.5 W 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 (I-4) 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.
Publisher version (URL)http://dx.doi.org/10.1063/1.2907438
Appears in Collections:(ICMM) Artículos
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