The absorption spectra and the fluorescence spectra of YbYP_xV_(1-x)O_4 crystal were measured at room temperature, from which the Stark levels of the Yb3+ ion were concluded.

• 在室温下测试YPxV1-xO4和YbYP_xV_(1-x)O_4晶体的吸收光谱与荧光光谱，由此可初步判定Yb3+的Stark能级。