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The silicate glass micro-particles of co-doped with Er3+ and Yb3+ were prepared by a combustion process and
characterized from the spectroscopic point of view, with the aim of investigating the effect and mechanisms of
upconversion emissions. The upconversion emissions at 522nm and 547nm have been obtained by exciting the silicate
glass micro-particle [about 30μm in diameter] under 976nm diode laser excitation. The excitation intensity was up to
about 1800W/cm2. It was observed that the intensity ratio of the 522-nm emission to the 547-nm emission (I522nm/I547nm)
in silicate glass increased when increasing the excitation intensity. I522nm became larger than I547nm when the excitation
intensity was above 300W/cm2. It is proposed that the phenomenon resulted from the rise of the temperature of the
sample measured.
Jiyou Wang,Nanzheng Li,Lipu Wang, andPing Duan
"Upconversion emission of Er3+/Yb3+-codoped silicate glass micro-particle under high excitation intensity", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74934R (20 October 2009); https://doi.org/10.1117/12.833674
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Jiyou Wang, Nanzheng Li, Lipu Wang, Ping Duan, "Upconversion emission of Er3+/Yb3+-codoped silicate glass micro-particle under high excitation intensity," Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74934R (20 October 2009); https://doi.org/10.1117/12.833674