掺镱光子晶体光纤激光器谐振腔的实验研究  

Experimental study about the cavity of Yb^(3+) -doped photonic crystal fiber laser

作　　者：刘宗华[1] 郑义[1] 

机构地区：[1]北京交通大学理学院,北京100044

出　　处：《激光技术》2014年第1期105-108,共4页Laser Technology

摘　　要：为了对光纤激光器的谐振腔进行优化,研究了976nm半导体激光器后向抽运掺Yb3+双包层光子晶体光纤在不同腔结构下的输出特性。在实验中分别采用平面镜和平凹镜作为后腔镜对谐振腔进行了研究,利用平面镜做后腔镜时,存在模式竞争现象,激光输出线宽约10nm,激光输出斜率效率为9%;而利用平凹镜做后腔镜时,模式稳定,激光输出线宽约5nm,激光输出斜率效率为11%。结果表明,利用平凹镜做后腔镜时,激光器的模式更稳定、线宽更窄,并且效率更高。To optimize the fiber laser cavity, an Yb3＋ -doped double-cladding photonic crystal fiber （PCF） was pumped with a 1lOW muhimode LD at central wavelength of 976nm, and the PCF laser characteristics were examined. A dichroic flat mirror and a dichroic flat-concave mirror were used as the back cavity-mirror respectively. There happened the model competition phenomenon in the first laser. And the line width of the PCF laser with a flat-concave mirror as the back cavity-mirror was about 5nm, while another one was above lOnm. Besides, slope efficiency of the former was 11%, and the latter＇ s was just 9%. It has stable model, narrower emission line width and higher slope efficiency in the PCF-laser with a flat-concave mirror as the back cavity-mirror.

关 键 词：激光技术 光纤激光器 掺镱光子晶体光纤 后向抽运 波导谐振腔 

分 类 号：TN248.1[电子电信—物理电子学]