30 January 2013 High power Nd:YAG laser with self-pumped phase-conjugate loop cavity and repetitive pulsed diode-matrix side-pumping
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Proceedings Volume 8677, XIX International Symposium on High-Power Laser Systems and Applications 2012; 86770Z (2013) https://doi.org/10.1117/12.2016458
Event: XIX International Symposium on High-Power Laser Systems and Applications, 2012, Istanbul, Turkey
Abstract
The joule-range high-beam-quality Nd3+:YAG laser oscillation in the multiloop self-pumped phase-conjugate cavity without an output coupling mirror at four-wave mixing of intracavity beams directly in the 110-mm long Nd3+:YAG rod with 12.6 kW diode side-pumping is developed and studied. The oscillation efficiency of up to 18 % and average power of up to 22 W were achieved in the optimized geometry of the laser cavity at the 13.9 kW pumping with repetition rate of up to 20 Hz and pulse duration of up to 475 μs. The laser generated a single high-intensive 200-ns giant laser pulse (or series of such pulses with microsecond period at increased pumping) oscillated at self-Q-switch on gain gratings with relatively narrow linewidth of about 2 GHz followed by low-intensive free-running wideband lasing. We also realized a passive Q-switch by the F2-:LiF and Cr4+:YAG crystals with oscillation of pulse trains and also 30-ns single-pulse oscillation with an individual pulse energy of up to 60 mJ and peak power of up to 4 MW at narrowed laser spectra down to 1.7 GHz.
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Anastasiya P. Pogoda, Tamara B. Lebedeva, Marsel R. Yusupov, Rostislav A. Liventsov, Vyacheslav F. Lebedev, Anatoliy S. Boreysho, Andrey V. Gavrilov, Sergey N. Smetanin, Alexandr V. Fedin, "High power Nd:YAG laser with self-pumped phase-conjugate loop cavity and repetitive pulsed diode-matrix side-pumping", Proc. SPIE 8677, XIX International Symposium on High-Power Laser Systems and Applications 2012, 86770Z (30 January 2013); doi: 10.1117/12.2016458; https://doi.org/10.1117/12.2016458
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