搭建了1018 nm全光纤激光系统,实验研究了增益光纤长度、光纤布拉格光栅的反射率以及增益光纤的芯包比等参数对1018 nm激光性能的影响。实验研究表明:对于双包层掺镱光纤,可通过减小增益光纤长度使短波长激光获得更大增益,进而实现1018 nm激光输出;通过增加低反布拉格光栅反射率和增益光纤芯包比可以更好地抑制自发辐射以及提升激光器的效率。基于15/130μm的国产双包层掺镱光纤,在1018 nm波段获得了大于150W的激光输出,光光转换效率为71%,自发辐射得到了有效的抑制。 A 1018 nm all-fiber laser system was constructed. The effects of gain fiber length, fiber Bragg grating reflectivity and gain-to-fiber ratio on the performance of 1018 nm laser were experimentally investigated. Experimental results show that for a double-clad ytterbium-doped fiber, the gain of the short-wavelength laser can be increased by reducing the gain of the optical fiber and the laser output of 1018 nm can be achieved. By increasing the reflectivity and gain of the low anti-Bragg grating, Better suppress spontaneous emission and improve the efficiency of the laser. Based on the 15 / 130μm domestic double - clad Yb - doped fiber, the laser output of more than 150W was obtained in the 1018 nm band. The light conversion efficiency was 71% and the spontaneous emission was effectively suppressed.