Mao Yuhong, Chen Xiaobo, Zhang Guangyin, Li Meixian. ANALYSIS OF THE EQUILIBRIUM STATE OF FOUR-LEVEL AVALANCHE UPCONVERSION SYSTEM[J]. Chinese Journal of Luminescence, 1995,16(2): 134-138
Mao Yuhong, Chen Xiaobo, Zhang Guangyin, Li Meixian. ANALYSIS OF THE EQUILIBRIUM STATE OF FOUR-LEVEL AVALANCHE UPCONVERSION SYSTEM[J]. Chinese Journal of Luminescence, 1995,16(2): 134-138DOI:
Properties of the four-level avalanche upconversion system are carefully investigated using a rate equation analysis of the equilibritlm state.It is clarified that avalanche upconversion would open only when pumping laser strength and cross-relexation are bigger than a threshold level.The population variations of every energy level upon the cross-relexation and transition rates are given in this paper.