D形内包层掺Yb^(3+)光纤激光器动态特性的研究  

Dynamics Characteristic of D-shape Inner Cladding Yb^(3+)-doped Fiber Laser

作　　者：樊亚仙[1] 胡姝玲[1] 吕福云[1] 吕可诚[1] 董孝义[1] 

机构地区：[1]南开大学物理科学学院光电信息科学系,天津300071

出　　处：《中国激光》2003年第4期303-306,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金 (No .6 99770 12 );国家自然科学基金重点项目 (No .6 0 1370 10 )资助课题

摘　　要：对LD抽运的D形内包层掺Yb3 + 光纤激光器的动态特性进行了实验研究。在单镜和双镜两种腔结构中 ,研究了激光器的动态特性。在单镜腔结构中 ,激光器表现出很强的自脉动行为 ,脉冲宽度为微秒量级。随着抽运功率的增强 ,开始出现更精细的结构 ,周期不规则 ,脉宽几十纳秒 ;在双镜腔结构中 ,自脉冲被有效地抑制 ,在抽运功率较大时 ,在直流强度上叠加了周期为 2 0 0ns ,脉宽约 10ns稳定的脉冲序列。双镜腔的激光稳定性较单镜腔有所改善 ,激光阈值功率明显下降。Experiment study of dynamics characteristic of D-shape inner cladding Yb3+-doped fiber laser is presented. The fiber laser in one-mirror and two-mirror cavity is pumped by a multi mode laser diodes. Self-pulsing regimes are obtained in one-mirror cavity. The Brillouin pulses appear with the increasing of pump power. The pulse duration is as short as 10 ns. The self-pulses are suppressed in the two-mirror cavity. In this case the stability of the laser is improved, and the threshold of the laser decreases.

关 键 词：D形内包层 掺YB^3+光纤激光器 动态特性 LD抽运 时域特性 

分 类 号：TN248.1[电子电信—物理电子学]