Further more, Er-doped area is discussed. We increased Er doping concentration bydoping La3+ in conventional Al-Er fibers. Compared with conventional Al-Er fibers, absorption peak of Al-Er-Lafibers at 1550nm are improved 29.1%.

• 讨论了铒掺杂区域的大小；通过在常规Al-Er光纤中掺杂La3+；来增加Er的掺杂浓度；实现高浓度掺杂；在1530nm的吸收峰值Al-Er-La光纤比Al-Er光纤提高了29.；1%25。