摘要
文章综述了大功率情况下双包层光纤激光器中的非线性和热效应。在较低功率的激光输出时,光纤内的非线性和热效应对激光输出特性的影响很小,但在高功率的掺Yb3+双包层光纤激光器中,特别是功率达到千瓦量级时,非线性和热效应已经成为限制功率提升的主要因素。通过增大包层光纤芯径、缩短光纤长度都可以增加非线性阈值,从而可以保证单根光纤信号功率增大时不会出现非线性效应。采用分布式泵浦方案,能够得到沿光纤长度上最低和最均匀的温度分布,并且使激光器有最大的输出功率。
The paper summarizes the nonlinearity and beat effect in double-clad fiber laser with high power. When the output power of laser is low, the nonlinearity and heat effect have little influence on laser characters. But in Yb-doped double-clad fiber laser with high power, especially kilowatt power, the nonlinearity and heat effect become the chief factor to limit the increase of laser power. By increasing the radius of double-clad fiber and shortening fiber length, the nonlinearity threshold will be enhanced, which can ensure that no nonlinearity will appear when optical signal power is increased. By using distributed pump, the temperature along fiber length will be the lowest and most uniform, and the output power of laser will be the most.
出处
《激光与红外》
CAS
CSCD
北大核心
2006年第9期829-832,共4页
Laser & Infrared
关键词
双包层光纤激光器
受激喇曼散射
受激布里渊散射
热效应
double-clad fiber laser
simulated Raman scattering
stimulated Brillouin scattering
beat effect
