LiNbO_3:Fe,M(M=Mg^(2+),Zn^(2+),In^(3+),Sc^(3+))晶体中的信号光与噪声光的竞争

AMPLIFICATION COMPETITION BETWEEN THE FANNING NOISE AND THE SIGNAL BEAM IN LiNbO 3∶Fe, M(M=Mg 2+ ,Zn 2+ ,In 3+ ,Sc 3+ ) CRYSTALS

分析了掺杂铌酸锂晶体的扇形噪声光的形成机制，讨论了信号光与扇形噪声光之间的光放大竞争问题．结果显示：由于信号光与扇形噪声之间光放大竞争，对于信号光的放大而言，存在一个最佳的光生伏特场，因而存在一个最佳入射泵浦光光强，使得信号光具有最大的放大倍数，同时噪声很弱．

The light amplification mechanism of fanning noise in doped lithium niobate crystals was analyzed and the light amplification competition between the signal beam and the fanning noise was discussed. Results show that, due to the light amplification competition between the signal beam and the fanning noise, there exists an optimum photovoltaic field in doped lithium niobate crystals and an optimum pump intensity for the light amplification of signal beam. With such optimum conditions, the signal beam can be amplified maximally while the fanning noise is very weak.