Dysprosium-doped YAl 3(BO 3) 4 (YAB) crystals: an investigation of radiative and non-radiative processes (original) (raw)
Related papers
Growth and spectroscopic properties of rare-earth doped YAl3(BO3)4 single crystals
Journal of Luminescence, 2003
A recent trend for UV-visible lasers is based on rare-earth doped crystals with self-frequency doubling (SFD). According to its absorption, luminescence, and nonlinear optical properties, the Huntite structured YAB (YAl 3 (BO 3 ) 4 ) is a prospective representative of such materials. Efficient laser emission and SFD have already been demonstrated for Nd:YAB and Yb:YAB crystals. Er, Yb, and Dy doped YAB crystals were grown by the top-seeded flux technique. Narrow absorption lines at 9 K in the Er:YAB spectra proved the good crystal quality and the uniform Er incorporation. Weak satellite lines indicated Er interactions either with other Er ions or crystal defects at high Er concentrations. The good crystal quality was confirmed by the long (1.11 ms) luminescence lifetime at RT in the Yb:YAB crystals. The Yb-transitions were broadened by strong coupling with lattice vibrations. The first growth and spectroscopic investigation of Dy:YAB were reported. Concentration dependent lifetime of the Dy luminescence was observed. r
Luminescence dynamics of YAl3(BO3)4:Sm3+ crystals
Journal of Luminescence, 2013
Sm 3+ spectroscopy Luminescence of rare earth ions YAl 3 (BO 4 ) 3 :Sm 3+ Energy transfer a b s t r a c t YAl 3 (BO 3 ) 4 crystals doped with Sm 3+ were grown from potassium trimolybdate flux. Their absorption and emission spectra were measured at room temperature. The Judd-Ofelt parametrization scheme has been applied to the analysis of the room temperature absorption spectra. The emission decay profiles were measured at 77 and 298 K on differently concentrated crystals in order to obtain information on the excited states dynamics. The calculated radiative lifetime of the 4 G 5/2 state is 2.3 ms, and it is reasonably consistent with the experimental results. The analysis of the concentration and temperature effects on the decay curves allowed a reliable understanding of the energy transfer processes responsible for the non radiative decay of the emitting excited level in the investigated material.
Thermal and laser properties of Yb:YAl3(BO3)4 crystal
Journal of Crystal Growth, 2003
Large optical-quality Yb:YAl 3 (BO 3 ) 4 (Yb:YAB) crystals have been grown by the flux method. The thermal properties of Yb:YAB crystal were measured for the first time. The thermal properties of Yb:YAB crystal with different Yb 3+ ion concentrations are also reported. The results show that the ytterbium concentration influences the properties of Yb:YAB crystal. The specific heat decreases with the increase of Yb 3+ ion concentrations in the experiment range. Apparently, the thermal expansion coefficient increases along the c-direction with the increase of Yb 3+ ion concentrations, while it changes slightly along the a-direction. The output laser in 1120-1140 nm ranges has been demonstrated pumped by InGaAs laser. The slope efficiency is 3.8%. The self-frequency-doubling output power of 1 mW is achieved. r
Transitions intensities and cross-sections of Tb3+ ions in YAl3(BO3)4 crystal
OSA Continuum, 2021
A Tb3+:YAB crystal was grown using a high-temperature solution growth on dipped seeds technique. Polarized ground state absorption and fluorescence spectra from the 5D4 level, as well as a fluorescence decay curves of 5D4 and 5D3 levels, were recorded at room temperature. Radiative properties such as emission probabilities, branching ratios, and radiative lifetime were investigated within the theory of 4f-4f transition intensity in the case of the intermediate configuration interaction.
Journal of Luminescence, 2007
Spectroscopic characterization is carried out to identify Stark's levels of Yb 3+ transitions in several fluoride crystals grown either by the Czochralski technique or by the laser-heated pedestal growth method. Yb 3+ concentration dependence of the decay time is analyzed in order to understand involved concentration quenching mechanisms. Laser tests under saphire:Ti pumping are presented for all our materials as well as under diode pumping for Yb:CaF 2 .
Crystal growth and spectroscopic characterization of Yb-doped and Yb, Na-codoped PbF2 laser crystals
Journal of Alloys and Compounds, 2011
High-quality pure PbF 2 , Yb:PbF 2 and Yb, Na:PbF 2 crystals are grown by the Bridgman method in a nonvacuum atmosphere. Room-temperature absorption, photoluminescence spectra, and fluorescence lifetimes belonging to the transitions between ground state 2 F 7/2 and the excited state 2 F 5/2 of Yb 3+ ions in these crystals have been investigated. The influence of codoping with Na + ions on the spectra has been studied. Experimental results show that codoping Na + ions in different Na:Yb ratios can modulate the spectroscopy and photoluminescence properties of Yb 3+ ions in a PbF 2 lattice in a large scope: the Na + ions codoping with Yb 3+ as charge compensators can suppress the deoxidization of Yb 3+ to Yb 2+ , enhance the luminescence intensity and lengthen luminescence lifetime of Yb 3+ ions.
… Acta Part A: Molecular …, 2001
Single crystals of YAl 3 (BO 3 ) 4 doped with 1 and 10% Pr 3 + were grown by spontaneous nucleation from a K 2 Mo 3 O 10 and B 2 O 3 flux. Polarised absorption and luminescence spectra in the visible, near infrared and infrared ranges were recorded at room and low temperatures on ground and polished samples of about 1 mm thickness. The microsymmetry of the Pr 3 + sites is D 3 . The observed transitions were assigned and analysed on the basis of the selection rules for the D 3 point group. A set of free ion and crystal field parameters in reasonable agreement with the observed energy level structure is reported. The possible applications of the material in the field of optical devices are considered.
Growth, Stark energy level and laser properties of Yb:Ca4YO(Bo3)3 crystal
Materials Research Bulletin, 2000
Yb:Ca 4 YO(BO 3 ) 3 (Yb:YCOB) crystal was grown by the Czochralski method. The polarization absorption and fluorescence spectra were measured. The Stark energy level was determined based on the absorption and fluorescence spectra. When pumped by a laser diode (LD) at 976.4 nm, the output laser at 1032 nm was demonstrated.
Crystal growth and laser properties of new RAl3(BO3)4 (R=Yb,Er) crystals
Optical Materials, 2007
Er, Yb):YAl 3 (BO 3) 4 ((Er, Yb):YAB) single crystals were grown from seeds using K 2 Mo 3 O 10-B 2 O 3 fluxed melts. Thin films of Yb:YAl 3 (BO 3) 4 (Yb-5 and 10 at.%) (Yb:YAB) were obtained by LPE method on substrates of YAB crystals. Spectroscopic properties of (Er, Yb):YAB crystals were investigated, the CW (continuous-wave) and Q-switched lasing with maximal output power of 245 mW in CW regime was demonstrated under continuous-wave laser diode pumping.