通过高温熔融法制备了Er3+/Yb3+共掺磷酸盐纤芯玻璃，设计并熔制了组分相异的纤包玻璃，采用棒管法拉制Er3+/Yb3+共掺芯包异质型磷酸盐玻璃光纤，并对光纤开展增益测试。在980 nm波长的激光激发下，当激发功率为457.1 mW 时，在 1535.7 nm波长处获得32.3 dB的相对增益和15.0 dB的内增益，光纤的内增益系数达2.6 dB/cm。

Er3+/Yb3+ codoped phosphate glass is prepared using a high-temperature melting method. The cladding glass with different compositions has been designed and prepared, and the rod-in-tube technique is employed in fabricating Er3+/Yb3+ codoped core-cladding heterogeneous glass fiber. Under the excitation of 980 nm wavelength laser, when the pumping power increases to 457.1 mW, the relative and internal gains of the optical fiber are 32.3 and 15.0 dB at 1535.7 nm, and a maximum internal gain-coefficient of 2.6 dB/cm is achieved.