介绍了一种全光纤窄线宽脉冲激光器。该激光器由两部分组成,即脉冲光纤激光器种子和由隔离器、耦合器以及光纤光栅组成的窄线宽脉冲提取装置。脉冲光纤激光器种子是基于半导体可饱和吸收镜(SESAM)为锁模机制的全光纤被动锁模激光器,输出脉冲的光谱宽度约为3 nm。窄线宽脉冲提取部分对脉冲光纤激光器种子输出脉冲的光谱进行提取、窄化,输出脉冲的光谱宽度约为0.1 nm。该激光器操作简单、设备简易,为全光纤结构;不仅可以输出窄线宽光脉冲序列,而且同时还可以输出脉冲光纤激光器种子的光脉冲序列,极大地拓展了脉冲光纤激光器的应用范围。 An all-fiber narrow-linewidth pulsed laser is introduced. The laser consists of two parts, a pulsed fiber laser seed and a narrow linewidth pulse extraction device consisting of an isolator, a coupler and a fiber grating. Pulsed Fiber Laser Seeds are all-fiber passively mode-locked lasers based on the SESAM mode-locking mechanism. The output pulse has a spectral width of about 3 nm. The narrow-linewidth pulse extraction part extracts and narrows the spectrum of the pulse output from the pulsed fiber laser, and the output pulse has a spectral width of about 0.1 nm. The laser is simple in operation and simple in equipment. It is an all-fiber structure. It not only can output a narrow linewidth optical pulse sequence, but also can output the optical pulse sequence of the pulsed fiber laser seed, which greatly expands the application range of the pulsed fiber laser.