Optoelectronics Letters, Volume. 9, Issue 4, 285(2013)
Spectral properties and energy transfer in Er3+/Yb3+codoped LiYF4crystal
Laser crystals of LiYF4(LYF) singly doped with Er3+in 2.0% and co-doped with Er3+/Yb3+in about 2.0%/1.0% molar fraction in the raw composition are grown by a vertical Bridgman method. X-ray diffraction (XRD), absorption spectra, fluorescence spectra and decay curves are measured to investigate the structural and luminescent properties of the crystals. Compared with the Er3+ singly doped sample, obviously enhanced emission at 1.5 μm wavelength and green and red up-conversion emissions from Er3+/Yb3+co-doped crystal are observed under the excitation of 980 nm laser diode. Meanwhile, the emission at 2.7 μm wavelength from Er3+singly doped crystal is reduced. The fluorescence decay time ranging from 18.60 ms for Er3+singly doped crystal to 23.01 ms for Er3+/Yb3+co-doped crystal depends on the ionic concentration. The luminescent mechanisms for the Er3+/Yb3+co-doped crystals are analyzed, and the possible energy transfer processes from Yb3+to Er3+are proposed.
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WANG Pei-yuan, XIA Hai-ping, PENG Jiang-tao, HU Hao-yang, TANG Lei, ZHANG Yue-pin, CHEN Bao-jiu, JIANG Hao-chuan. Spectral properties and energy transfer in Er3+/Yb3+codoped LiYF4crystal[J]. Optoelectronics Letters, 2013, 9(4): 285
Received: Mar. 1, 2013
Accepted: --
Published Online: Oct. 12, 2017
The Author Email: Hai-ping XIA (xiahaiping@nbu.edu.cn)