DocumentCode :
1213676
Title :
Efficient 2- 
m Continuous-Wave Laser Oscillation of Tm 
:KLu(WO 
) 
m Continuous-Wave Laser Oscillation of Tm :KLu(WO ) Author :
Mateos, Xavier ; Petrov, Valentin ; Liu, Junhai ; Pujol, Maria Cinta ; Griebner, Uwe ; Aguiló, Magdalena ; Díaz, Francesc ; Galan, Miguel ; Viera, Gregorio
Author_Institution :
Max-Born-Inst. for Nonlinear Opt. & Ultrafast Spectrosc., Berlin
Volume :
42
Issue :
10
fYear :
2006
Firstpage :
1008
Lastpage :
1015
Abstract :
Monoclinic crystals of Tm-doped KLu(WO4)2 were grown with high crystalline quality for several dopant concentrations. The relevant spectroscopic properties for the 3 F4rarr3H6 laser transition (cross sections, lifetime) were measured at room temperature. Laser oscillation in the 2-mum range was obtained both with Ti:sapphire and diode laser pumping near 800 nm using different setups. The maximum output powers achieved were 1.4 and 4 W, respectively, and the corresponding slope efficiencies with respect to the absorbed power were 60% and 69%, respectively. The novel monoclinic double tungstate thulium host KLu(WO4)2 was directly compared to KGd(WO4)2 and exhibited superior performance. The two laser polarization configurations for Tm:KLu(WO4)2 ,E//Nm and E//Np, were also compared under identical conditions with pumping by the polarized Ti:sapphire laser. Tuning was studied for both of them using an intracavity Lyot filter and the tuning range achieved was from 1800 to 1987 nm. In the case of no polarization selective cavity elements the diode-pumped Tm:KLu(WO4 )2 laser naturally selected the E//Nm polarization
Keywords :
laser cavity resonators; laser transitions; laser tuning; light polarisation; lutetium compounds; optical pumping; potassium compounds; solid lasers; thulium; 1.4 W; 1800 to 1987 nm; 2 mum; 293 to 298 K; 4 W; 800 nm; Al2O3:Ti; KLu(WO4)2:Tm; Ti:sapphire laser; Tm3+:KLu(WO4)2 oscillation; continuous-wave laser; crystalline quality; diode laser pumping; double tungstate thulium host; intracavity Lyot filter; laser oscillation; laser polarization; laser transition; laser tuning; monoclinic crystals; monoclinic tungstate thulium host; polarization selective cavity elements; room temperature; spectroscopic properties; Crystallization; Diode lasers; Laser excitation; Laser transitions; Laser tuning; Polarization; Power generation; Pump lasers; Spectroscopy; Temperature measurement; Crystals; lasers; rare earth compounds; solid lasers; thulium; tungsten compounds;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.2006.881629
Filename :
1695974
Link To Document :
