Key Laboratory for Optics and Magnetic Resonance Spectroscopy of Ministry of Education, Department of Physics, East China Normal University, Shanghai 200062，China
Abstract：In the Pr3+-doped Y2SiO5，the population in 1D2 of Pr3+ can be transferred to 3P0 state via non-radiative energy transfer by the laser eｘcitation in resonance with 3H4→1D2，and we can experimentally study the Stark splitting of 3H4 energy level via 3P0→3H4 anti-Stokes emission spectra. Because the anti-Stokes emission spectra can avoid the energy transfer between different crystallographic site 1D2 energy levels, the above splitting lines attribution is more accurate than the assignment via 1D2→3H4 Stokes spectra by the laser eｘcitation in resonance with 3H4→1D2. In addition，the character of the anti-Stoｋes fluorescence decay time was observed.
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