High Power Laser Science and Engineering, Vol. 9, Issue 1, 01000e11 (2021)
Diode-pumped, electro-optically Q-switched, cryogenic Tm:YAG laser operating at 1.88 μm
Jörg Körner1,2,3,*, Venkatesan Jambunathan1, Fangxin Yue1, Jürgen Reiter2,3, Ondřej Slezák1, Petr Navrátil1, Samuel Paul David1, Antonio Lucianetti1, Joachim Hein2,3, Tomáš Mocek1, and Malte C. Kaluza2,3
- 1HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, Dolní Břežany, Czech Republic
- 2Institute of Optics and Quantum Electronics, Friedrich Schiller University Jena, Jena, Germany
- 3Helmholz Institute Jena, Jena, Germany
We present a diode-pumped, electro-optically Q-switched Tm:YAG laser with a cryogenically cooled laser crystal at 120 K. Output pulses of up to 2.55 mJ and 650 ns duration were demonstrated in an actively Q-switched configuration with a repetition rate of 1 Hz. By using cavity dumping the pulse duration was shortened to 18 ns with only a slightly lower output energy of 2.22 mJ. Furthermore, using a simplified rate equation model, we discuss design constraints on the pump fluence in a pulse pump approach for Tm:YAG to maximize the energy storage capability at a given pump power.
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