Quite recently an article on Diode-pumped, electro-optically Q-switched, cryogenic Tm:YAG laser operating at 1.88 μm was published in the scientific journal High Power Laser Science and Engineering. Below you can read the most important findings of our colleagues and co-authors of the article, Venkatesan Jambunathan, Fangxin Yue, Ondrej Slezak, Petr Navratil and Samuel Paul David.
In this paper, you can find results from an active electro-optical Q-switched laser system using Tm:YAG as the active medium and a rubidium titanyle phosphate (RTP) Pockels cell. “With the prototype presented here, a maximum output energy of 2.53 mJ in a 650 ns pulse was achieved in Q-switch operation with 28 W laser diode peak power for pumping. When using cavity dumping the pulse duration was shortened to 18 ns with a slightly lower output energy of 2.22 mJ. With these parameters, we believe to be presenting the first Q-switched Tm:YAG laser emitting at 1.88 μm, which also represents a first important step toward realizing a well-adapted, pulse-pumped source for Cr:ZnSe lasers,” say the authors of the article. Moreover, there is another topic discussed in the paper – 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.
Here you can read the whole article.