Semiconductor saturable absorber Q-switching of a holmium micro-laser.


We report on a Holmium micro-laser passively Q-switched by a semiconductor saturable absorber (SSA), for the first time to the best of our knowledge. It is based on a 1 at.% Ho:YAG ceramic with good energy storage capability and several commercial transmission-type SSAs with 0.24% modulation depth. Under in-band pumping by a Tm fiber laser at 1910 nm, the Ho micro-laser generated 450 mW at 2089 nm with 37% slope efficiency. Stable 89 ns, 3.2 μJ pulses are achieved at a repetition rate of 141 kHz. Further shortening of the laser pulses is feasible with the increase of the modulation depth of the SSA while power scaling may lead to Q-switching at MHz-range repetition rates.

DOI: 10.1364/OE.25.004579

Cite this paper

@article{Lan2017SemiconductorSA, title={Semiconductor saturable absorber Q-switching of a holmium micro-laser.}, author={Ruijun Lan and Xavier Mateos and Yicheng Wang and Josep Maria Serres and Pavel A Loiko and Jiang Li and Yubai Pan and Uwe Griebner and Valentin Petrov}, journal={Optics express}, year={2017}, volume={25 5}, pages={4579-4584} }