Spectral Properties of Pr, R3+: SrF2(R=Y, Gd) Laser Crystal

doi:10.15541/jim20160671

Abstract

Abstract:

A series of co-doped Pr, Y: SrF₂ and Pr, Gd: SrF₂ crystals were grown by the vertical Bridgman method and the influence of codoping ions on the lattice parameters and spectral properties of Pr: SrF₂ crystal was studied. The results show that the doping of different kinds and concentration of the regulator ions can effectively improve the crystal absorption cross-section and emission intensity. Through changing the cluster structure and the local coordination structure of the luminescent center of the crystals, the law of different peaks’ emission intensities of Pr, R³⁺: SrF₂(R=Y, Gd) crystals varies with each other. Most of the peaks’ emission intensities increase firstly and then decrease, and other few peak’s law is opposite or its emission intensity keeps nearly unchanged. Influence of the regulator ions on internal cluster and local structure of the crystal is testified based on the unit cell parameters and the fluorescence lifetime spectra. In general, the optical properties of Pr: SrF₂ crystals are improved after codoping with the regulator ions, especially with 6.0at% Y³⁺ and 10.0at% Gd³⁺, which optical properties reach the best.

Key words: laser materials, Pr: SrF2 crystal, regulator ions, spectral properties

CLC Number:

JU Qiang-Wen, MEI Bing-Chu, YU Hao, QIAN Xiao-Bo, WANG Jing-Ya, MA Feng-Kai, SU Liang-Bi. Spectral Properties of Pr, R³⁺: SrF₂(R=Y, Gd) Laser Crystal[J]. Journal of Inorganic Materials, 2017, 32(9): 943-948.

Figures/Tables 6

Fig. 1 Unit cell parameters of Pr3+, Re3+: SrF2 crystals with different regulator ion concentrations

Fig. 2 Absorption cross section-spectra of 0.6 at%Pr3+, R3+: SrF2 crystals at room temperature

Fig. 3 0.6at%Pr3+, R3+: SrF2 absorption cross-section at room temperature for different regulator ion concentration

Fig. 4 Room temperature emission spectra of 0.6at%Pr3+, R3+: SrF2 crystals

Fig. 5 Room temperature emission intensity of 0.6at%Pr3+, R3+: SrF2 with different regulator ion concentrations

Fig. 6 Fluorescence lifetime of 0.6at%Pr3+, R3+: SrF2 with different R3+ concentrations

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Spectral Properties of Pr, R³⁺: SrF₂(R=Y, Gd) Laser Crystal

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