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25 May 2011 Pulsed 2-micron lasers based on Tm3+-doped monoclinic double tungstate crystals
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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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
X. Mateos, M. Segura, W. B. Cho, A. Schmidt, F. Rotermund, M. C. Pujol, J. J. Carvajal, M. Aguiló, F. Díaz, V. Panyutin, U. Griebner, and 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);


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