25 May 2011 Pulsed 2-micron lasers based on Tm3+-doped monoclinic double tungstate crystals
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Abstract
Monoclinic crystals of Tm-doped KLu(WO4)2 were used to demonstrate pulsed laser operation near 2 μm. Passive Qswitching and passive mode-locking were the techniques employed to produce such laser pulses. For passive Qswitching we used an AlGaAs -based diode laser to pump the active elements and Cr:ZnSe and Cr:ZnS crystals as saturable absorbers. For passive mode-locking we used a Ti:sapphire laser as pump source and single-walled carbon nanotubes as saturable absorbers. In the former case, maximum pulse energies of 200 μJ for a pulse duration of 70 ns were achieved at a repetition rate of 3 kHz with Cr:ZnS saturable absorber, while in the latter case, ultrashort pulse durations of ~10 ps were measured with a maximum average power of 240 mW. In both laser regimes the oscillation wavelength was ~1945 nm.
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X. Mateos, X. Mateos, M. Segura, M. Segura, W. B. Cho, W. B. Cho, A. Schmidt, A. Schmidt, F. Rotermund, F. Rotermund, M. C. Pujol, M. C. Pujol, J. J. Carvajal, J. J. Carvajal, M. Aguiló, M. Aguiló, F. Díaz, F. Díaz, V. Panyutin, V. Panyutin, U. Griebner, U. Griebner, V. Petrov, V. Petrov, } "Pulsed 2-micron lasers based on Tm3+-doped monoclinic double tungstate crystals", Proc. SPIE 8039, Laser Technology for Defense and Security VII, 803902 (25 May 2011); doi: 10.1117/12.886787; https://doi.org/10.1117/12.886787
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