单纵模窄线宽光纤激光器的研究

单纵模窄线宽光纤激光器已经在石油勘探、光纤传感器和海底通信等领域得到很好的应用。目前可用于实现窄线宽输出的技术主要有使用基于光纤布拉格光栅（FBG）的线宽压缩结构、基于饱和吸收体的模式选择技术以及基于复合腔的激光器结构。为此着眼于如何实现激光器的单纵模窄线宽输出，技术上主要研究应用于两大腔体结构的线宽压缩技术，并在此基础上提出改进方案。

Single Longitudinal-Mode and Narrow Linewidth Fiber Lasers

Single longitudinal-mode （SLM） and narrow linewidth fiber lasers have been used in oil survey, fiber optic sensor and submarine communications successfully. Nowadays it can use fiber Bragg grating based modediscriminator, saturable absorber based mode filters, and complex cavity to help improve the output linewidth of fiber laser. Aiming at the implementation of single longitudinal-mode narrow linewidth of laser, the linewidth compression technique used for two cavity structures are studied, and the improving solution is proposed on this basis.