High-efficiency, high-power and low threshold Yb3+:YAG ceramic laser

Istituto di Fisica Applicata Carrara, IFAC-CNR Via Madonna del Piano 10C, 50019 Sesto Fiorentino (FI), taly.
Optics Express (Impact Factor: 3.49). 12/2009; 17(25):23344-9. DOI: 10.1364/OE.17.023344
Source: PubMed


We present a high-power, high-efficiency and low threshold laser prototype based on doped ceramic Yb3+:YAG. We achieved an output power of 9 W with a slope efficiency of 73% and a threshold of 1 W at 1030 nm in quasi-Continuous Wave (QCW). Moreover, we obtained an output power 7.7 W with a slope efficiency of 60% in Continuous Wave (CW). Finally, a characterization of a low losses tunable cavity for several laser wavelengths with an output power exceeding 5 W is reported. (C) 2009 Optical Society of America

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    • "The situation remained unchanged until 1995, when Ikesue et al. [1] [7] first demonstrated the possibility of fabricating transparent Nd:YAG ceramics of sufficient quality for solid-state lasers with reasonable efficiency. Since then, quite a few studies on YAG laser ceramics have been reported, concerning on Nd:YAG [2] [8] [9], Yb:YAG [10] [11] [12], Tm:YAG [13] [14], Ho:YAG [15] [16] and Er:YAG [17] [18] [19] and other materials. There are two basic methods to fabricate YAG transparent ceramics. "
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    Optical Materials 07/2014; 36(9). DOI:10.1016/j.optmat.2014.04.038 · 1.98 Impact Factor
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    • "Since their appearance on the scene, polycrystalline transparent materials of cubic structure doped [1] [2] [3] [4] with rare earths as Nd 3+ [5] [6] [7] and Yb 3+ [8] [9] [10], are found to be appealing as laser gain materials showing all their potentiality in term of shortness of the pulse [11] [12] [13], average power level and beam quality. In consequence of that, in the past years many efforts have been made to improve and refine the techniques of fabrication paving the way to a new class of diode-pumped solid-state lasers. "
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    ABSTRACT: We present the performance of a laser prototype based on 1% at. Yb : Lu 2 O 3 ceramic, longitudinally pumped in quasi-CW regime at 968 nm. A slope efficiency of 49% with respect to the absorbed pump power was obtained for laser operation at 1032.5 nm. We studied the effects on the laser oscillation due to the reinjection of the residual pump. The thermal behavior of the sample was investigated by means of numerical simulations, accounting for the different thermal load resulting from spontaneous and laser emission. Finally, we report the measured level of the Amplified Spontaneous Emission, which is found to be less than 0.1 mW.
    Advances in Optical Technologies 04/2012; 2012. DOI:10.1155/2012/484235
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    ABSTRACT: In this work we expose a recently developed theoretical model for the analysis of the measurements obtained with the so-called pinhole method, for the determination of the upper level lifetime in materials where the superimposition between fluorescence and absorption spectra determines significant radiation trapping effect. Under fairly general conditions the fluorescence decay curve after a pulsed excitation of the sample obtained with this experimental set-up can be conveniently described by a double exponential functional form. The faster of the two decay times is close to the intrinsic fluorescence lifetime, with a difference that can be calculated with geometrical considerations. The theoretical results were tested with a suitably designed experiment, where the upper level lifetime of the laser transition of some Yb doped samples were investigated, obtaining results that are consistent with literature data and in good agreement with the theoretical results as for the temporal dependence of the fluorescence decay.
    Laser Physics 12/2012; 22(12). DOI:10.1134/S1054660X12120262 · 1.03 Impact Factor
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