The optical properties of Tm3+ doped Na5Lu9F32 single crystal

Qi-guo Sheng; Hai-ping Xia; Qing-yang Tang; Shi-nan He; Jian-li Zhang; Bao-jiu Chen

doi:10.1007/s11801-017-7025-6

Optoelectronics Letters ›› , Vol. 13 ›› Issue (3) : 201-205. DOI: 10.1007/s11801-017-7025-6

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The optical properties of Tm³⁺ doped Na₅Lu₉F₃₂ single crystal

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Abstract

Tm³⁺ doped Na₅Lu₉F₃₂ single crystal with high optical quality was grown by an improved Bridgman method. The Judd-Ofelt intensity parameters Ω_t (t=2, 4, 6) were calculated according to the measured absorption spectra and physical-chemical properties of the obtained Na₅Lu₉F₃₂ single crystal. The stimulated emission cross-section of the ³F₄→³H₆ transition (~1.8 μm) is 0.35×10^-20 cm² for Tm³⁺ doped Na₅Lu₉F₃₂ single crystal. The emission spectra under the excitation of 790 nm laser diode (LD) and fluorescence lifetime at 1.8 μm were measured to reveal the fluorescence properties of Tm³⁺ doped Na₅Lu₉F₃₂ single crystal. The research results show that the Tm³⁺ doped Na₅Lu₉F₃₂ single crystal has larger stimulated emission cross-section compared with other crystals. All these spectral properties suggest that this kind of Tm³⁺doped Na₅Lu₉F₃₂ crystal with high physical-chemical stability and high-efficiency emission at 1.8 μm may be used as potential laser materials for optical devices.

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Qi-guo Sheng, Hai-ping Xia, Qing-yang Tang, Shi-nan He, Jian-li Zhang, Bao-jiu Chen. The optical properties of Tm³⁺ doped Na₅Lu₉F₃₂ single crystal. Optoelectronics Letters, , 13(3): 201‒205 https://doi.org/10.1007/s11801-017-7025-6

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This work has been supported by the National Natural Science Foundation of China (Nos.51472125 and 51272109), the Natural Science Foundation of Zhejiang Province (No.LZ17E020001), and K.C. Wong Magna Fund in Ningbo University.