The analysis shows that cascade oscillation of the Ho3+:ZBLAN fiber laser can produce 3 m and 2 m laser beams with high conversion efficiency, and it is easy to achieve cascaded oscillation.

• 数值分析表明，级联振荡Ho~(3+)：ZBLAN光纤激光器具有极高的能量转换效率，并容易产生级联振荡。