Passively Q-switched high-energy all-solid-state holographic Nd:YAG laser with a multiloop cavity

V. F. Lebedev; A. P. Pogoda; A. S. Boreysho; S. N. Smetanin; A. V. Fedin

doi:10.1117/12.2070421

3 February 2015 Passively Q-switched high-energy all-solid-state holographic Nd:YAG laser with a multiloop cavity

V. F. Lebedev, A. P. Pogoda, A. S. Boreysho, S. N. Smetanin, A. V. Fedin

Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 925509 (2015) https://doi.org/10.1117/12.2070421
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

Abstract

A high-energy, high-beam-quality laser based on a single Nd:YAG rod with laser diode side-pumping and multiloop self-adaptive reciprocal cavity is presented. The optimized laser cavity geometry allowed to change the laser oscillation from single 200-ns self-Q-switched pulse followed by low-intensity free-running lasing to repetitive high-intensive pulses by periodically writing and erasing holographic gain gratings in the active Nd:YAG medium. The intensified self-Q-switching pulse train oscillation was realized by the interaction with a diffusely reflecting target placed in the focal plane of a lens at the laser output. Effects of shortening of the repetitive laser pulses down to 70-ns duration, stabilization of the pulse repetition period (~ 5 μs), and mode-locking temporal modulation of the pulses were observed. The use of a passive F2–:LiF Q-switch resulted in stable giant pulse train oscillation with total output energy of up to 0.43 J, individual pulse energy of 50 mJ, and its peak power of 4 MW at the individual pulse duration of 12 ns.

Citation Download Citation

V. F. Lebedev, A. P. Pogoda, A. S. Boreysho, S. N. Smetanin, and A. V. Fedin "Passively Q-switched high-energy all-solid-state holographic Nd:YAG laser with a multiloop cavity", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 925509 (3 February 2015); https://doi.org/10.1117/12.2070421

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