Spectroscopic properties of UV active medium Ce³⁺:LiSr<inf>0.8</inf>Ca<inf>0.2</inf>AlF<inf>6</inf>

© 2015 Elsevier B.V.The aim of this work is phase composition and near UV spectroscopic studies of UV active media in fluoride crystals with colquiriite structure, such as Ce3+:LiSr0.8Ca0.2AlF6. Colquiriite structure mixed crystals show higher segregation coefficient of Ce3+ activator ions than common LiCaAlF6 hosts. An important result is based on the fact that this enhancement was achieved for two types of Ce3+ centers in a multisite Ce:LiSr0.8Ca0.2AlF6 system. Thus, it provides a higher gain coefficient for the 5d-4f transitions of Ce3+ ions and it spans a wider continuous wavelength tuning range between 280 and 320 nm for tunable Ce:LiSr0.8Ca0.2AlF6 laser systems

Growth of solid solutions with colquiriite structure LiCa0,2Sr0,8AlF6: Ce3+

© Published under licence by IOP Publishing Ltd. Aim of this work were experiments on growing new materials based on fluoride crystals with the colquiriite structure LiSr0,8Ca0,2F6, as well as the study of their phase composition. It is shown that for a series of crystals LiSr0,8Ca0,2F6 distribution of reflections observed corresponds to the colquiriite structure, and the dependence of the lattice constant in the transition from LiCaAlF6 crystal to LiSrAlF6 crystal is linear. Also it found that absorption coefficient in mixed samples is much larger than in not mixed

Distribution coefficient of Pr3+ ions in crystals of solid solutions LiF-LuF3-YF3-PrF3

© Published under licence by IOP Publishing Ltd. Aim of this work was to investigate the possibility of increasing the distribution coefficient of Pr3+ ions in fluoride crystals with scheelite structure. As a result of investigations by XRF and optical absorption spectroscopy the absorption cross section for 3H0 3P0 transitions Pr3+ ions was clarified and segregation coefficient of Pr3+ ions in LiY0,3Lu0,7F4 mixed crystals was estimated

Spectroscopic properties of UV active media Ce³⁺:LiCa<inf>1-x</inf>Sr<inf>x</inf>AlF<inf>6</inf>

© 2016 IEEE.Optical absorption spectroscopy studies have shown that mixed crystals Ce3+:LiCa0,2Sr0,8AlF6 grown by Bridgeman technique exhibit more than 3 times higher absorption coefficient compared to Ce3+:LiCaAlF6 sample. An important result is based on the fact that this enhancement was achieved for two types of Ce3+ centers in a multisite Ce:LiSr0.8Ca0.2AlF6 system

Pump-probe studies of absorption saturation and optical gain in Ce:LiCaAlF6 ultraviolet active medium

Aim of this work was to investigate nonlinear absorption of pump radiation in UV spectral range of Ce3+:LiCaAlF6 crystalline active medium. We were able to evaluate excited state absorption cross-section at pump wavelength (266 nm) and recombination probabilities by means of computer simulation. © Published under licence by IOP Publishing Ltd

Photodynamic processes in LiCaAlF6:Ce3+ UV active medium

© Published under licence by IOP Publishing Ltd. The objectives of this paper are experimental studies of pump-induced effects in LiCaAlF6: Ce3+ single crystals and computer model elaboration and appropriated software package engineering. The elaborated experimental technique and software allow either to calculate the nonlinear absorption/gain characteristics of the active medium on the basis of known parameters, or to find its previously unknown parameters from pump-probe experimental dependences

Perspectives of creating powerful solid-state optical amplifiers based on a Ce3+:LiCaAlF6 crystal

Pump-induced photodynamic processes in Ce3+:LiCaAlF6 (Ce:LiCAF) UV active media were studied by pump-probe technique. The modelling of a multipass optical amplifier testify the opportunity to design high-power UV laser system based on Ce:LiCAF media

Spectroscopic properties of UV active media Ce³⁺:LiCa<inf>1-x</inf>Sr<inf>x</inf>AlF<inf>6</inf>

© 2016 IEEE.Optical absorption spectroscopy studies have shown that mixed crystals Ce3+:LiCa0,2Sr0,8AlF6 grown by Bridgeman technique exhibit more than 3 times higher absorption coefficient compared to Ce3+:LiCaAlF6 sample. An important result is based on the fact that this enhancement was achieved for two types of Ce3+ centers in a multisite Ce:LiSr0.8Ca0.2AlF6 system

Spectroscopic properties of UV active medium Ce³⁺:LiSr<inf>0.8</inf>Ca<inf>0.2</inf>AlF<inf>6</inf>

© 2015 Elsevier B.V.The aim of this work is phase composition and near UV spectroscopic studies of UV active media in fluoride crystals with colquiriite structure, such as Ce3+:LiSr0.8Ca0.2AlF6. Colquiriite structure mixed crystals show higher segregation coefficient of Ce3+ activator ions than common LiCaAlF6 hosts. An important result is based on the fact that this enhancement was achieved for two types of Ce3+ centers in a multisite Ce:LiSr0.8Ca0.2AlF6 system. Thus, it provides a higher gain coefficient for the 5d-4f transitions of Ce3+ ions and it spans a wider continuous wavelength tuning range between 280 and 320 nm for tunable Ce:LiSr0.8Ca0.2AlF6 laser systems