Optical study of single crystals grown by the Czochralski method from Yb3+-doped (Gd1−x Y x )2SiO5 solid solution

Abstract

Yb 3+ -doped crystals were grown by the Czochralski method from (Gd 0.5 Y 0.5 ) 2 SiO 5 melt employing seeds cut out from single crystals of Yb:Gd 2 SiO 5 and Yb:Y 2 SiO 5 . XRD analysis revealed that the structure of the solid solution crystals grown is consistent with the structure of the seed, namely C2/c for the Yb:Y 2 SiO 5 seed and P2 1 /c for the Yb:Gd 2 SiO 5 seed. Optical absorption spectra, emission spectra and luminescence decay curves were recorded at 10 K and 300 K. Analysis of gathered spectroscopic data made it possible to evaluate radiative transition rates for the 2 F 5/2 multiplet of Yb 3+ in the two structures and to assess crystal field splitting of multiplets involved in radiative transitions. It has been concluded that transition intensities and relaxation dynamics of Yb 3+ in the systems studied are similar but the intensity distribution of emission and absorption bands depends significantly on the system structure. This feature, combined with inhomogeneous broadening of spectral lines, may be advantageous for the tailoring of lasers employing ytterbium-doped crystals for specific applications.

Lifetime of environmental/thermal barrier coatings deposited on a niobium silicide composite with boron containing M7Si6‐based bond coat

“…Gadolinium probably dissolves in Y 2 SiO 5 forming a (Y,Gd) 2 SiO 5 solid solution. Such solid solutions, doped with rare earth metal ions, have been studied for optical applications . Interdiffusion also occurred at the Y 2 SiO 5 /TGO interface, as confirmed by the detection of Ti and Y in the yttrium silicate coating and TGO, respectively, possibly indicating the formation of yttrium containing compounds, like Y 2 Ti 2 O 7 and YFeO 3 .…”

Revealing Electron–Phonon Coupling Dependence on the π-Conjugated Groups in Rare-Earth Borates

“…The energy difference of GS and ES for Yb 3+ ions is 10194−10309 cm −1 , corresponding to the ZPL at 970−981 nm. Therefore, there would be an inevitable overlap between pure transitions and vibronic transitions, usually yielding a homogeneous broadening fluorescence from 980 to 1100 nm 31,32 and the indistinguishable quantitative contribution from electron−phonon coupling. In comparison, the GS 8 S 7/2 of Gd 3+ is nondegenerate, which can avoid the overlap between vibronic transitions and other pure electronic transitions (Figure 2b).…”

Spectroscopic investigation of Er3+-doped (Gd0.7Y0.3)2SiO5 single crystal for potential application in 1.5μm laser

“…The results imply that G 0.7 Y 0.3 SO lattice supply Er 3+ ions with a crystalfiled environmental similar to that of GSO. Because in the crystal growth process, a GSO crystal (not YSO) was used as the seed, thus G 0.7 Y 0.3 SO crystal has similar crystallographic structures to GSO [8]. Furthermore, it is should be noted that a common feature of these systems is a dominant value of the˝2 parameter.…”

“…The crystal structures and spectroscopic properties of Re 3+ doped GYSO and LYSO are well documented [8,9], and the efficient cw tunable laser applying Yb 3+ :GYSO system are already realized [10]. In the view of such advantages of solid solutions mentioned above, Er 3+ :GYSO single crystal is also considered as a promising material to obtain efficient ∼1.5 m laser.…”