The research of transverse mode instability in high power narrow line width fiber lasers
High-power narrow line width fiber lasers have a wide scope of application,such as beam synthesis technology.The causes of the transverse mode instability(TMI)effect in high-power narrow linewidth fiber lasers and the methods for suppressing the TMI effect effectively are introduced,which can provide a reference for further increas-ing the output power of narrow line width fiber lasers.