透镜组耦合793nm LD抽运掺Tm3+光纤激光器

Tm3+-doped fiber lasers pumped by double lens coupling 793nm LD

摘要: 为了实现2μm激光高效输出，采用793nm激光二极管端面抽运掺Tm3+光纤激光器的方法设计了抽运光耦合系统，分析了掺Tm3+光纤激光器的交叉弛豫效应及热效应，并进行了相关的实验研究。结果表明，获得耦合系统的耦合效率为84%；当入纤抽运光功率为70W时，获得34W激光输出，斜率效率为59%，中心波长为2001.2nm，光束质量M2≤1.2。该研究结果对掺Tm3+光纤激光器的设计具有指导意义。

Abstract: To achieve 2μm laser output, 793nm LD face-pumping Tm3+-doped fiber laser was adopted. Double lens coupling system was designed. Cross relaxation of Tm3+-doped fiber laser and thermal effect were analyzed, and then the related experiments were carried out. The results show that coupling efficiency of coupling system is 84%. When the pump power is 70W, the output power is 34W with slop efficiency of 59%, central wavelength of 2001.2nm and M2 of less than 1.2. The results are helpful to design Tm3+-doped fiber lasers.