激光二极管抽运Na,Yb共掺CaF_2晶体自调Q激光特性的研究  

Characterization of Laser-Diode-Pumped Self-Q-Switched Laser Operation of a Na,Yb^(3+)∶CaF_2 Single Crystal

作　　者：薛迎红[1] 王清月[1] 柴路[1] 苏良碧[2] 徐军[2] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室(天津大学),天津300072 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《中国激光》2005年第10期1313-1316,共4页Chinese Journal of Lasers

基　　金：国家973计划(G1999075201-2;2003CB314904);国家杰出青年基金(60425516)资助项目

摘　　要：利用激光二极管(LD)抽运新型Na,Yb共掺CaF2(Na,Yb∶CaF2)晶体,获得了1.05μm的自调Q激光输出。利用透射率1%的耦合输出镜,得到最低激光输出的抽运阈值功率仅为70 mW。在透射率为2%的输出镜条件下,得到最大输出激光功率为390 mW,此时激光的斜度效率达到20%。实验详细记录了自调Q脉冲的周期和宽度随抽运功率的变化关系,随着抽运功率的增加,自调Q脉冲的周期和宽度呈指数衰减。同时,还采用单棱镜进行光谱调谐实验,获得了1036~1059 nm的自调Q激光调谐输出。A laser-diode-pumped self-Q-switched laser operation with Na and Yb co-doped CaF2 （ Na, Yb： CaF2 ） system at center wavelength of 1.05 μm is demonstrated. The threshold absorbed pump power is only 70 mW with a transmission output coupler of 1%. A laser slope efficiency of 20% with respect to the absorbed 976 nm pump power is obtained by use of a 2% transmission output coupler. Synchronously, the maximal output laser power of 390 mW is obtained. The period and width of self-Q-switched pulses versus input power characterization are shown. The results show that both period find width of Q-switched pulses decrease exponentially with increasing of input power. The laser wavelength can be tuned between 1036 and 1059 nm.

关 键 词：激光技术 激光二极管抽运 Na Yb:CaF2晶体 自调Q激光器 调谐输出 

分 类 号：TN248.1[电子电信—物理电子学]