[Calculation of spectroscopic parameters of highly doped Er3+ in lithium niobate].
A highly doped Er3+: LiNbO3 (concentration 6 mol%) crystal was grown successfully by Czochralski method. The crystal is higher than that of the lowly doped Er3+ in LiNbO3 crystal, which is helpful to improve absorption coefficient of the grown the pumping efficiency. The absorption spectra at two unpolarized directions (X and Z) and two polarized directions (E parallel Z, E perpendicular Z) were measured. Using the Judd-Ofelt theory, and according to the measured absorption spectra, the intensity parameters omegalambda of Er3+ were fitted. The results of root-mean square (r. m. s) deviation show that the error of polarized fitting is less than that of unpolarized one. Thus fluorescence transition probabilities (Ajj), radioactive lifetime (tau), fluorescence branching ratio (beta), and integrated emission cross section (sigmap) were calculated and accepted according to the polarized results, and were also discussed and compared with the ones reported in the literature.
Sun
Dun-lu
DL
Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
Zhang
Qing-li
QL
Wang
Ai-hua
AH
Hang
Yin
Y
Zhang
Lian-han
LH
Qian
Xiao-bo
XB
Zhu
Shi-ning
SN
Yin
Shao-tang
ST
D000465:Algorithms; D003460:Crystallization; D004871:Erbium / Q000737:chemistry*; D008962:Models, Theoretical; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
D010087:Oxides; D009556:Niobium; C091692:lithium niobate; D004871:Erbium