Title :
Ho:KLu(WO4)2 Microchip Laser Q-Switched by a PbS Quantum-Dot-Doped Glass
Author :
Loiko, P. ; Serres, J.M. ; Mateos, X. ; Yumashev, K. ; Malyarevich, A. ; Onushchenko, A. ; Petrov, V. ; Griebner, U. ; Aguilo, M. ; Diaz, F.
Author_Institution :
Center for Opt. Mater. & Technol., Belarusian Nat. Tech. Univ., Minsk, Belarus
Abstract :
We report on passive Q-switching of a Ho:KLu(WO4)2 (Ho:KLuW) microchip laser in-band-pumped by a Tm:KLuW laser at ~1.96 μm. As a saturable absorber, PbS-quantum-dot-doped glass was used which exhibits a saturation intensity of ~3 MW/cm2 near 2 μm. Maximum average output power of 84 mW was achieved from the Ho laser at 2.061 μm with a slope efficiency of 42% (with respect to the absorbed pump power). The shortest pulse duration was 30 ns. In the continuous-wave mode, the maximum output power of the Ho laser reached 530 mW at 2.08 μm with a slope efficiency of 88%.
Keywords :
IV-VI semiconductors; Q-switching; holmium; laser beams; lead compounds; microchip lasers; optical pumping; optical saturable absorption; potassium compounds; semiconductor quantum dots; thulium; Ho laser; Ho:KLu(WO4)2 microchip laser Q-switching; Ho:KLu(WO4)2 microchip laser in-band-pumping; KLu(WO4)2:Ho; KLuW:Tm; PbS; PbS quantum-dot-doped glass; PbS-quantum-dot-doped glass; Tm:KLuW laser; absorbed pump power; continuous-wave mode; passive Q-switching; power 530 mW; power 84 mW; pulse duration; saturable absorber; saturation intensity; slope efficiency; time 30 ns; wavelength 1.96 mum; wavelength 2.061 mum; wavelength 2.08 mum; Crystals; Glass; Laser excitation; Laser modes; Microchip lasers; Pump lasers; Semiconductor lasers; Double tungstates; Q-switching; double tungstates; holmium; in-band-pumping; microchip laser; quantum dots;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2439576
