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Your search keyword '"Xu, Xiaodong"' showing total 30 results
Start Over Author "Xu, Xiaodong" Publication Year Range Last 10 years Journal journal of luminescence Publisher elsevier b.v.
30 results on '"Xu, Xiaodong"'

28. Spectroscopic and laser properties of Tm:CNGG crystals grown by the micro-pulling-down method.

Author

Xue, Yanyan, Li, Na, Wang, Donghai, Wang, Qingguo, Liu, Bin, Song, Qingsong, Li, Dongzhen, Xu, Xiaodong, Gu, Hongan, Qin, Zhipeng, Xie, Guoqiang, Wang, Zhanshan, and Xu, Jun

Subjects
*SEMICONDUCTOR lasers, *CRYSTALS, *SINGLE crystals, *FLUORESCENCE spectroscopy, *CONTINUOUS wave lasers, *CRYSTAL structure, *ABSORPTION spectra
Abstract

Tm3+-doped calcium niobium gallium garnet (Tm:CNGG) single crystals have been successfully grown by the micro-pulling-down (μ-PD) method. The crystal structure, absorption spectra, fluorescence spectra and lifetimes of Tm:CNGG crystals were investigated. The absorption and emission bandwidths of Tm:CNGG crystals are larger than those of other Tm3+ doped garnet crystals, which will be beneficial for laser diode (LD) pumping and ultrashort pulse generation. Additionally, continuous wave (CW) laser operation around 2 μm was achieved in the 2.0 at.% Tm:CNGG crystal by LD pumping. [ABSTRACT FROM AUTHOR]

Published
2019
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29. A new near-infrared broadband laser crystal: Cr3+ doped YScO3.

Author

Li, Jianda, Hou, Wentao, Xue, Yanyan, Wang, Qingguo, Song, Qingsong, Wang, Fangyan, Yu, Haohai, Liu, Jian, Xu, Xiaodong, Xu, Jun, and Tang, Huili

Subjects
*SOLID-state lasers, *TUNABLE lasers, *MOLECULAR spectra, *CRYSTAL growth, *CRYSTALS
Abstract

In this paper, the Floating zone technique was used to grow high-quality Cr3+:YScO 3 crystals. The absorption cross-sections of the 4A 2 →4T 1 transition and 4A 2 →4T 2 transitions were calculated to be 1.71 × 10−20 cm2 at 488 nm and 0.72 × 10−20 cm2 at 666 nm, respectively. The crystal field strength Dq, Racah parameters B, and C were calculated to be 1502 cm−1, 533 cm−1, and 3362 cm−1, respectively. In the Cr3+:YScO 3 crystal, the effective phonon energy and Huang-Rhys factor S were calculated to be 284 cm−1 and 8.62, respectively. The emission cross-section at 988 nm corresponding to the 4T 2 →4A 2 transition was calculated to be 1.44 × 10−20 cm2 with full width at half maximum (FWHM) of 318 nm. All the results show that Cr3+:YScO 3 crystal has the potential to be a tunable and ultrafast laser crystal. • Cr:YScO 3 crystals were successfully grown by the Floating zone technique(FZ) method. • Broad emission spectrum with full width at half maximum (FWHM) of 318 nm in Cr:YScO 3 crystals was observed. • Spectral properties and crystal field parameters of Cr:YScO 3 crystals were investigated and analysed. [ABSTRACT FROM AUTHOR]

Published
2023
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30. Ho:CaYAlO4 shaped crystal fibers grown by the micro-pulling-down method and optical properties.

Author

Chen, Peng, Liu, Jian, Xu, Jie, Guo, Jun, Zhang, Zhiheng, Li, Dongzhen, Liu, Peng, Wang, Xiaodan, Xu, Xiaodong, Xu, Jun, and Lebbou, Kheirreddine

Subjects
*CRYSTAL whiskers, *OPTICAL properties, *MID-infrared lasers, *ACTIVE medium, *ULTRA-short pulsed lasers, *TUNABLE lasers
Abstract

Ho3+-doped CaYAlO 4 (Ho:CALYO) crystal fibers have been successfully grown from the melt by the micro-pulling-down (μ -PD) technique for the first time. The polarized absorption spectra, fluorescence spectra and lifetime decay curves were measured at room temperature. The most intense emission of 2 at.% Ho:CALYO crystal fiber appears at 2072 nm with the full width at half maximum (FWHM) of 181.1 nm for σ polarization and at 2022 nm with FWHM of 199.4 nm for π polarization, respectively. The decay lifetimes of 5I 7 state of Ho:CALYO crystal fibers with different holmium concentration were calculated. All the results show that Ho:CALYO crystal fiber has potential as a laser gain medium for ultrashort and tunable Mid-infrared laser system. • Ho:CaYAlO 4 shaped crystal fibers with different Ho3+ concentration were grown using by the micro-pulling-down method. • The effect of Ho3+ concentration on the spectroscopic properties of Ho:CaYAlO 4 crystal fibers was studied. • Ho:CaYAlO 4 crystal fibers have large FWHMs of fluorescence spectra, which is better for tunable and short pulse laser output. [ABSTRACT FROM AUTHOR]

Published
2023
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