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[期刊论文]

Yb3+ dopant concentration dependence in Yb:CaGdAlO4 bulk crystals

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author:

Liu, Xiaohu (Liu, Xiaohu.) [1] | Li, Jianfu (Li, Jianfu.) [2] | Zhu, Zhaojie (Zhu, Zhaojie.) [3] | Unfold

Indexed by:

EI Scopus SCIE

Abstract:

Yb:CaGdAlO4 (Yb:CALGO) single crystals having a series of Yb3+ concentrations (0.5, 1.7, 2.5, 5.0, 7.2, and 8.0 at%) were grown using the Czochralski method. X-ray powder diffraction (XRD), polarized absorption, fluorescence spectra, and Raman spectra were measured for the synthesized crystals to investigate the influence of the doping concentration of Yb3+ on the structure and spectral properties. The results indicate that Yb3+ doping concentrations within the tested range induce a negligible change in the structure but a significant change in the absorption and fluorescence features. Both polarized absorption and emission intensity in the pi and sigma-polarization increase with the increment of Yb3+ concentration. The fluorescence lifetimes, determined using the powder concentration dilution method, varied from 0.454 ms to 0.527 ms. Various spectral cross-sections of Yb:CALGO crystals were calculated and analyzed. Moreover, within the examined range, Yb3+ concentration exhibits negligible impact on the positions of the primary peaks observed in the Raman spectra. However, a notable intensity difference was observed at 311 cm-1 in the Raman spectra measured along the a- and c-directions, which can be attributed to variations in the linkage of AlO45- groups. This work provides a basis for the Yb:CALGO femtosecond laser experiments by optimizing the Yb3+ concentrations.

Community:

  • [ 1 ] [Liu, Xiaohu]Fuzhou Univ, Coll Chem, Fuzhou 350108, Peoples R China
  • [ 2 ] [Liu, Xiaohu]Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China
  • [ 3 ] [Li, Jianfu]Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China
  • [ 4 ] [Zhu, Zhaojie]Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China
  • [ 5 ] [Tu, Chaoyang]Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China
  • [ 6 ] [Wang, Yan]Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China
  • [ 7 ] [Lakshminarayana, G.]Shenzhen Technol Univ, Future Technol Sch, Shenzhen 518118, Peoples R China

Reprint 's Address:

  • [Wang, Yan]Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China

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Source :

CRYSTENGCOMM

Year: 2025

Issue: 8

Volume: 27

Page: 1090-1102

2 . 6 0 0

JCR@2023

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

30 Days PV: 1

Online/Total:148/10764431
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