Passive Q-switching of an Yb:KLu(WO4)2 laser with 2D saturable absorbers of MoS2 and WS2: Scaling the output power to 2-W level
Abstract
We report on a highly efficient, compact, passively Q-switched Yb:KLu(WO4)2 laser, with few-layer MoS2 or WS2 acting as saturable absorber. A maximum output power of 2.45 W was generated at a repetition rate of 2.52 MHz, with 6.49 W of pump power absorbed in passively Q-switched operation induced by MoS2; the largest pulse energy, shortest duration, and highest peak power were, respectively, 1.27 μJ, 43 ns, and 29.5 W. With WS2 as saturable absorber, the output power attainable in stable Q-switched operation was 1.87 W, produced with an optical-to-optical efficiency of 37% and a slope efficiency of 71%. The minimum pulse duration obtained was 39 ns; while the largest pulse energy and highest peak power were 1.19 μJ and 30.5 W.
- Publication:
-
Optics Communications
- Pub Date:
- April 2019
- DOI:
- 10.1016/j.optcom.2018.12.009
- Bibcode:
- 2019OptCo.436...42T
- Keywords:
-
- Yb-ion laser;
- Passive Q-switching;
- 2D MoS<SUB>2</SUB>;
- 2D WS<SUB>2</SUB>