@ARTICLE{Kwiatkowski_J._Highly_2015,
 author={Kwiatkowski, J.},
 volume={vol. 23},
 number={No 2},
 journal={Opto-Electronics Review},
 pages={165-171},
 howpublished={online},
 year={2015},
 publisher={Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology},
 abstract={An efficient operation of a Ho:YLF laser pumped by a Tm-doped fibre laser is reported. The research in a continuous-wave (CW) operation was done for two crystals of the same 0.5 at.%Ho dopant concentration and with different lengths (3×3×30 mm3 and 3×3×50 mm3). For an output coupling transmission of 20% and a crystal length of 50 mm, the maximum CWoutput power of 38.9 W for 81.4 W of incident pump power, corresponding to the slope efficiency of 52.3% and optical-to-optical conversion efficiency of 47.8% (determined with respect to the incident pump power) was achieved. The highest opti- cal-to-optical conversion efficiency of 70.2% with respect to the absorbed pump power was obtained. The influence of a heat-sink cooling water temperature on theCWlaser performance was studied. For a Q-switched operation the pulse repe- tition frequency (PRF) was changed from 2 to 10 kHz. The maximum average output power of 34.1 W at the PRF of 10 kHz was obtained for a 50 mm holmium crystal length. For 2 kHz PRF and 71.9 W of incident pump power, pulse energies of 13.7 mJ with a 21 ns FWHM pulse width corresponding to 652 kW peak power were recorded.},
 type={Article},
 title={Highly efficient high power CW and Q-switched Ho:YLF laser},
 URL={http://journals.pan.pl/Content/116136/PDF-MASTER/pan_doi_blank.pdf},
 keywords={mid-infrared lasers, Ho:YLF, solid-state lasers, 2-μm lasers, Q-switched lasers},
}