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9LS-P-5
Q-switched two-micron lasing on ZrO2-Y2O3-Ho2O3 crystals
S.A. Artemov1, E.A. Artemov2, E.E. Lomonova2, P.A. Ryabochkina1, A.N. Chabushkin3
1 - N.P. Ogarev Mordovian State University, ul. Bol'shevistskaya 68, 430005 Saransk, Russia;
2 - LLC 'International Center of Quantum Optics and Quantum Technologies', ul. Novaya 100, 143025
Skolkovo, Moscow region, Russia;
3 - Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, 119991
Moscow, Russia
Sergey560113@gmail.com
We investigated the energy and time characteristics of Q-switched pulsed two-micron lasing at the 5I7—>5Is transition of Ho3+ ions in ZrO2-Y2O3-Ho2O3 crystals under resonance pumping to the 5I7 level of these ions by a CW solid-state laser based on the LiYF4:Tm crystal .
The laser cavity 80 mm long was formed by a flat input mirror (T=93% at a pump wavelength of 1910 nm and T=0.1% at a lasing wavelength of 2120 nm) and a spherical output mirror (with a radius of curvature of 150 mm and a T=6% at a generation wavelength). To ensure the laser operation in the Q-switched mode, an acousto-optic modulator (AOM) was placed in front of the output spherical mirror. The active elements 3x3x21 mm in size were cut from a ZrO2-13.4mol.%Y2O3-0.6mol.%Ho2O3 crystal grown by directional crystallization of the melt in a cold container at a rate of 4 mm/h. The faces of active elements were subjected to mechanochemical polishing for 10 min.
Fig. 1 shows the spectrum of lasing on the 5I7—5I8 transition of Ho3+ ions, obtained in the Q-switched mode with a pulse duration of 117 ns at a pulse repetition rate of 1 kHz. The oscillogram of the shortest pulse and a typical pulse train at a repetition rate of 1 kHz are shown in Fig. 2.
Fig. 1. The spectrum of lasing on the 5I7—5I8 transition of Ho3+
Fig. 2. The oscillogram of the shortest pulse 117 ns and a typical pulse train at a repetition rate of 1 kHz
20039).
ions, obtained in the Q-switched mode
This work was supported by the Russian Foundation for Basic Research (Grant No. 18-29-
