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15/130 μm 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。

High power 1018 nm ytterbium doped fiber laser system is constructed. Output characteristics of 1018 nm laser with the length of gain fiber, the reflectivity of fiber Bragg gratings (FBG) and the diameter of core/cladding are experimentally investigated. It is found that the laser at short wavelength will get bigger gain by reducing the length of gain fiber for ytterbium doped fiber laser, 1018 nm laser can be obtained by shortening the length of gain fiber. Increasing the fiber bragg grating reflectivity and core/cladding area ratio are available approach to suppress the amplified spontaneous emission (ASE) gain and increase the laser efficient. A record output power more than 150 W at 1018 nm is obtained through using the domestic double cladding ytterbium doped fiber, with an optical- optical conversion efficiency of 71% , the ASE is suppressed efficiently.