掺镱双包层光纤激光器是国际上近年来发展的一种新型固体激光器，它具有光束质量好、体积紧凑、效率高等优点。介绍了高功率掺镱双包层光纤激光器的原理特点、发展现状及其应用前景。可以预计这种新型激光器必将逐步取代传统激光器。

Ytterbium-doped double-clad fiber laser is a new type of solid-state laser with extensive investigation in the world in recent years. The advantages of the fiber laser include good beam quality,compact structure and high efficiency. The fundamental principle,main characteristics and recent progress of fiber lasers are reviewed and their main applications are also prospected. It can be predicted that this novel laser will replace CO₂,and YAG lasers gradually.