采用助熔剂法生长出了掺杂均匀的Er_xY_(1-X)Al_3(BO_3)_4厘米级优质单晶.测定了晶体的吸收、激发光谱.用Judd_Ofelt理论计算了晶体中Er~(3+)的十一条谱带的振子强度(ρ_(ad)和ρ_(md)以及Er~(3+)的强度参数Q_λ(λ-2、4、6).并由此计算了Er~(3+)不同能级之间跃迁的爱因斯坦自发辐射系数A_r、辐射寿命r、荧光分支比β_3以及积分发射截面Σ.根据这些参数讨论了在EYAB晶体中可能实现激光输出的通道.

The homogeneously doped single crystal of ErxY1-xAl3 (603)4 in centimeter order was grown with flux mathod. The absorption and excitation spectra were measured. The oscillator gtrengths of eleven trasition bands and intensity parameters of Er ion were calculated by Jndd-Ofelt theory. From these results the Einstain spontaneous radiative emission cross-sections of different transitions were obtained. With these parameters the possible lasing transitions in EYAS crystal are discussed.