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28 February 2006 Side-pumped neodymium slab lasers Q-switched by V:YAG on 1.3μm
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Nd:YAG and Nd:YAP crystals in form of triangle which makes possible to realize a slab side-pumped configuration with one total internal reflection were tested as an active media for diode-pumped laser. The resonator arrangements for Q-switched regime were prepared for the emission corresponding to Nd3+ ion transition 4F3/24I13/2 referring to each crystal (λ= 1318 nm Nd:YAG and λ= 1342 nm Nd:YAP). Optical pumping was accomplished by a fast axis collimated quasi-CW diode DILAS E7Y1-808.3-600Q-H175V with peak power 600 W. Pumping radiation was focused by two plan-convex lenses into an active medium. The parameters of the pumping radiation were: wavelength 806nm, maximum pumping energy was 150mJ, pulse length 250μs, repetition rate up to 14 Hz. In free running regime the maximum reached energy was 24 mJ and 27.5 mJ for Nd:YAG and Nd:YAP, respectively. The corresponding obtained slope efficiency was 19.9 % and 23.7 % for Nd:YAG and Nd:YAP laser oscillator, respectively. Proper Q-switching for 1.3 μm was realized with saturable absorber V:YAG which initial transmission was optimized for shortest possible pulse length. For that obtained pulses were 6 ns with the energies 740 μJ and 432 μJ for Nd:YAG and Nd:YAP, respectively. This results correspond to peak power reached 125 kW (Nd:YAG), and 77 kW (Nd:YAP) in fundamental TEM00 mode which allows this laser to be used as an efficient source for further nonlinear conversion or other applications.
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Jan K. Jabczyński, Waldemar Żendzian, Jacek Kwiatkowski, Jan Šulc D.D.S., Michal Němec, and Helena Jelínkova "Side-pumped neodymium slab lasers Q-switched by V:YAG on 1.3μm", Proc. SPIE 6100, Solid State Lasers XV: Technology and Devices, 61001L (28 February 2006);


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