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Optical Engineering

Passively Q-switched neodymium slab lasers at 1.3-μm wavelength side-pumped by a 600-W laser diode stack
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Paper Abstract

Triangular slabs made of Nd:YAG or Nd:YAP crystals were tested as active media for diode-pumped lasers. The resonator arrangements for the Q-switched regime were prepared for emission corresponding to the Nd3+ ion transition 4F3/24I13/2in each crystal (λ=1318 nm for Nd:YAG, and λ=1342 nm for Nd:YAP). Optical pumping was accomplished by a fast-axis collimated quasi-cw diode laser stack with peak power of 600 W delivering up to 150 mJ of pump energy. In free-running regime, the maximum reached energies were 24 and 27.5 mJ for Nd:YAG and Nd:YAP crystals, respectively. The corresponding slope efficiencies were 19.9% and 23.7% for Nd:YAG and Nd:YAP laser oscillators, respectively. The passive Q switching for 1.3-μm wavelength was accomplished by means of a saturable absorber made of V3+:YAG crystal, whose initial transmission was optimized for the shortest possible pulse length. The 6-ns-duration giant pulses were obtained with energies of 740 and 432 μJ for Nd:YAG and Nd:YAP, respectively. These results correspond to attained peak powers of 125 kW (Nd:YAG) and 77 kW (Nd:YAP) in the fundamental TEM00 mode, which allows this laser to be used as an efficient source for further nonlinear conversion or other applications.

Paper Details

Date Published: 1 November 2006
PDF: 7 pages
Opt. Eng. 45(11) 114204 doi: 10.1117/1.2388950
Published in: Optical Engineering Volume 45, Issue 11
Show Author Affiliations
Jan Karol Jabczynski, Wojskowa Akademia Techniczna (Poland)
Waldemar Zendzian, Wojskowa Akademia Techniczna (Poland)
Jacek Kwiatkowski, Wojskowa Akademia Techniczna (Poland)
Jan Šulc, Czech Technical Univ. in Prague (Czech Republic)
Miroslav Nemec, Czech Technical Univ. in Prague (Czech Republic)
Helena Jelínková, Czech Technical Univ. in Prague (Czech Republic)

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