High-peak-power structured pulsed fields with controllable mode order by an Nd:YVO₄/Cr⁴⁺:YAG laser in a near-hemispherical resonator

Yu-Zhe Cheng^1*, Shu-Cheng Liu¹, Pi-Hui Tuan¹

¹Department of Physics, National Chung Cheng University, Chiayi, Taiwan

* Presenter:Yu-Zhe Cheng, email:jeff26.jheng@gmail.com

Oval-shaped structured pulsed fields with high-transverse mode order are generated by an Nd:YVO₄/Cr⁴⁺:YAG laser in a near-hemispherical resonator. By the thermally-assisted variation on the pump-lasing mode-matching condition, the mode order of oval pulsed fields can be straightforwardly controlled by the pump level. Under a pump level of 4.2 W, the average output power of oval structured pulses can reach up to 1.2 W with the repetition rate and peak power respectively exceed 98 kHz and 540 W while preserving quite regular temporal behavior.

Keywords: Structured beams, laser mode characterization, passively Q-switching