Yb∶Er共掺杂对掺铒光纤激光器中自脉冲行为的抑制作用  

Effect of Yb∶Er Codoping on Suppressing Self-Pulsing in Er-Doped Fiber Laser

作　　者：裴新[1] 向望华[1] 谭莉[1] 杜荣建[1] 张贵忠[1] 

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300072

出　　处：《光学学报》2004年第1期94-98,共5页Acta Optica Sinica

基　　金：国家自然科学基金 (6 99870 0 2 )资助课题

摘　　要：为了进一步提高镱铒共掺杂光纤激光器的实用性 ,对镱铒掺杂光纤激光器的自脉冲现象进行了理论分析。利用掺杂光纤中铒离子对的可饱和吸收的作用而引起自脉冲运转及离子对互作用模型作为理论基础建立系统模型 ,通过理论计算分析了共掺杂镱后掺铒光纤的有效抽运速率 ,证明了镱铒共掺杂可以提高有效抽运速率。使用这种光纤 ,可以使抑制光纤激光器中离子对导致的自脉冲效应所需的抽运功率水平大大降低。半导体激光器输出的抽运功率足以抑制由离子对导致的自脉冲 ,提供稳定激光运转。在研制稳定单频或高重复频率锁模光纤激光器方面 ,这种可用激光二极管抽运的镱铒共掺光纤具有很大的潜力。To improve the practicability of the Er∶Yb co-doped fiber laser,the self-pulse phenomena is discussed theoretically. Based on two theories a system model is setup. One is the saturable absorption of the Er ion-pair in the co-doped fiber will lead to self-pulsing;the other is the interplay between the ion-pairs. The effective pump rate for Er-doped fibers by Yb codoping is analyzed. It is shown that the level of the pump power required to suppress the ion pair induced self-pulsing in Er-doped fiber lasers can be significantly decreased by using Yb∶Er codoped fiber due to the increased effective pump rate. The output pump power of the laser diode is high enough to restrain this kind of self-pulse,which support stable laser operation. The result shows that the potential of developing stable single-frequency or high-repetition-rate mode-locked fiber lasers by using high gain Yb∶Er codoped fibers with laser diodes as pump sources.

关 键 词：铒离子掺杂 镱离子掺杂 光纤激光器 自脉冲 离子对互作用模型 有效抽运速率 

分 类 号：TN242[电子电信—物理电子学]