光纤激光器是近几年激光领域关注的热点之一，与传统的固体激光器相比，光纤激光器具有容易实现单模、高光束质量输出等优点。对双包层掺镱光纤工作原理及激光放大机理进行了研究，并设计实现了一种声光调 Q光纤激光器，该激光器不需要使用光纤隔离器等相关光纤元件，具有结构紧凑、效率高、线宽窄等优点。

Optical fiber lasers have become a highlight in the laser field in recent years. Compared with conventional solid-state lasers, optical fiber lasers have many advantages such as easy to form single mode and good beam quality, etc. The principle of double cladding Ytterbium doped fiber and its amplification are discussed. An acousto-optic Q-switched optical fiber laser is designed and relative optical fiber components such as laser fiber isolators are not to be used. The laser has the advantages of compact structure, high efficiency and narrow spectral line width, etc.