Tm:GGAG disordered garnet crystal for 2 µm diode-pumped solid-state laser

0547625 - FZÚ 2022 RIV DE eng J - Journal Article
Kratochvíl, J. - Boháček, Pavel - Šulc, J. - Němec, M. - Jelínková, H. - Fibrich, M. - Trunda, Bohumil - Havlák, Lubomír - Jurek, Karel - Nikl, Martin - Prajzler, V.
Tm:GGAG disordered garnet crystal for 2 µm diode-pumped solid-state laser.
Laser Physics Letters. Roč. 18, č. 11 (2021), č. článku 115802. ISSN 1612-2011. E-ISSN 1612-202X
Institutional support: RVO:68378271
Keywords : Tm:GGAG * disordered garnet * thulium laser * thulium concentration * 2μm laser * tunable laser
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 1.704, year: 2021
Method of publishing: Limited access
https://doi.org/10.1088/1612-202X/ac2519

Lasing parameters and wavelength tunability of a new disordered solid-state active medium, Tm3+-doped gadolinium gallium aluminum garnet (Tm3+-doped Gd3(Ga1-xAlx)5O12, Tm:GGAG), were investigated. Five samples with thulium concentration ranging from 1.4 at.% to 9.2 at.% (Tm/Gd) were designed, grown and investigated. Basic spectroscopic characterization and measurement of a refractive index were performed. Each sample was tested as an active medium of a 2 µm laser, longitudinally diode-pumped at 786 nm. Tm3+ concentration dependence of laser parameters was investigated. The highest slope efficiency of 43% w.r.t. absorbed power in the pulsed regime and 35% in the CW regime was achieved with the 2.4 at.% (Tm/Gd) sample. All samples produced beams of good quality with estimated M^2 <= 1.6. Concentration-dependent tunability was investigated and a smooth continuous range of wavelengths, up to 187 nm wide, was recorded.
Permanent Link: http://hdl.handle.net/11104/0323911