1. Pr 3+ -doped CeF 3 crystals: Analysis of optical traits and fluorescence from Pr 3+ : 1 D 2 level for visible and near-infrared lasers.
- Author
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Zheng L, Wang Y, Yang J, Zhu Z, You Z, Li J, Lakshminarayana G, and Tu C
- Abstract
In this work, four Pr
3+ -doped CeF3 crystals with 0.2, 0.4, 0.6, and 0.8 at.% Pr3+ ion doping levels nominally in the melt have been successfully grown, and their absorption and emission spectra, including fluorescence decay times were analyzed. Especially, yellow and near-infrared (NIR) emissions originating from Pr3+ :1 D2 level were explored in detail. In comparison, 0.2 at.% Pr3+ -doped sample showed better spectral parameters in all studied crystals. In such a crystal, at 443 nm wavelength, the derived absorption cross-section (σabs ) is 0.88 × 10-20 cm2 with full width at half maximum (FWHM) ∼ 10 nm in π polarization direction, whereas σabs is 1.32 × 10-20 cm2 with FWHM ∼ 6.7 nm in σ polarization direction at the same wavelength. Likewise, the calculated emission cross-section (σem ) for 594 nm wavelength is 0.69 × 10-20 cm2 in π direction and 0.46 × 10-20 cm2 in σ direction. Also, acquired σem at 790, 755, 1014, and 1432 nm wavelengths is 6.15 × 10-21 cm2 , 7.33 × 10-21 cm2 , 7.66 × 10-21 cm2 , and 6.56 × 10-21 cm2 individually. Here evaluated fluorescence decay time of1 D2 level is ∼ 200.6 μs. Obtained higher σabs , larger σem , and higher luminescence decay rates of 0.2 at.% Pr: CeF3 crystal specify its potential as a gain medium for orange and NIR lasers., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier B.V. All rights reserved.)- Published
- 2023
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