基于菲涅尔反射的光纤激光器功率测量方法  

Research on power measurement method of fiber laser based on Fresnel scattering

作　　者：冉欢欢[1,2] 潘旭东[1,2] 李腾龙[1,2] 王煜[1,2] 李旭[1,2] 

机构地区：[1]中国工程物理研究院高能激光科学与技术重点实验室,四川绵阳621900 [2]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2015年第8期1-5,共5页High Power Laser and Particle Beams

基　　金：中国工程物理研究院高能激光科学与技术实验室项目(515C-HEL2014-14)

摘　　要：分析了光纤熔接点处的菲涅尔散射光模型,得出熔接点散射光功率与输出光功率成线性关系的结论。利用该结论设计了kW级光纤激光器的振荡器、泵浦源输出功率检测装置,并安装在某kW级光纤激光器上进行了实验。通过建立线性估计函数,利用最小二乘法对光纤熔接点的散射光功率与光纤激光器的振荡器、泵浦源输出功率的关系进行了拟合。通过实验验证了熔接点散射功率与光纤输出功率的线性关系。实验表明利用熔接点散射光功率间接测量光纤激光器输出功率的方法线性度优于4%。The Fresnel reflection light model of fiber splicing point was analyzed,and it was concluded that there is a linear relationship between the scattered light power of splicing point and output optical power.The oscillator and pump source power detecting device of a kW-class fiber laser were designed with this conclusion,and mounted on a kW-class fiber laser in experiments.Through the establishment of linear estimation function using the least squares method for the fiber splice scattered light power of fiber laser oscillator and pump source,the relationship between the output power and the fiber splice scattered light power of fiber was fitted.The linear relationship was verified by experiments.Experiments show that the linearity of the method using splice scattered light power indirect measurement of fiber laser output power was less than 4%.

关 键 词：熔接点 菲涅尔反射 光纤激光器 线性关系 功率测量 

分 类 号：O221.2[理学—运筹学与控制论]