Abstract
We construct Q-switched megawatt-power level YSGG:Cr : Er and YSGG: Cr :Yb : Ho lasers operating in the repetition-rate mode of generation. We obtain the maximum output of 140 mJ at 1Hz and an output energy of 40 mJ in a Gaussian-like mode with a repetition rate of 5 and 10 Hz. The minimum pulse width is measured to be 50 ns. We discuss the influence of the repetition rate on the output energy and prove that a KTP crystal can be used as the electro-optic Q-switch for an YSGG:Cr : Yb :Ho laser. We achieve a 50 mJ pulse energy with 50 ns pulse width. We propose and implement a hybrid scheme of pulse-periodic two-wave generation of giant pulses in the cavity where the YSGG: Cr :Er and YSGG:Cr : Yb :Ho crystals are arranged sequentially, and Q-switching is performed using frustrated total internal reflection (FTIR). Simultaneously, we observe powerful generation at 2.79 and 2.8 μm. We discuss the possibility to implement a hybrid solid-state YSGG:Cr : Er–YSGG :Cr : Yb :Ho laser for THz generation and other applications.
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Gordienko, V.M., Potemkin, F.V., Pushkin, A.V. et al. Powerful 3μm YSGG:Cr : Er and YSGG: Cr :Yb : Ho Q-Switched Lasers Operating in the Repetition-Rate Mode. J Russ Laser Res 36, 570–576 (2015). https://doi.org/10.1007/s10946-015-9535-7
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DOI: https://doi.org/10.1007/s10946-015-9535-7