摘要
由于LDA本身的结构特点使其出射光束存在着大发散角、大像散等缺陷,采用LDA与光纤耦合的方式不但可以整形光束,还可以扩大LDA的应用领域。设计了LDA与微球端面光纤列阵和单根微球端面光纤耦合两种光束整形方式,分别进行了实验测试并分析了它们的输出特性。实验表明:利用LDA与微球端面光纤列阵耦合,可以实现31W的高功率连续激光输出,LDA与单根微球端面光纤耦合后出射的激光功率能够达到25W,光纤数值孔径为0.22。
Because of the structure deficiency of the laser diode array （LDA） ,which the shape of one lightening unit of the active layer is strongly dissymmetry, it has the large divergence angle and great optical aberration, so its laser beam must be shaped for the further use. Two fiber shaping methods were designed, one was using spherical micro-lensd fibers array to improve the coupling efficiency and the another was using a single micro-lensd fiber coupling system instead of the fibers array to get the small laser beam spot with high brightness. And the characteristics of the two coupling ways were also compared. Experiment proves that the coupling ways of LDA and fibers are useful with the high output power of 31 W by using micro-lensed fibers array. Especially, the 25 W output power by using single micro lensed fiber with the numerical aperture of 0.22 are obtained.
出处
《红外与激光工程》
EI
CSCD
北大核心
2008年第3期471-473,共3页
Infrared and Laser Engineering
基金
吉林省科委基金资助项目(20040301-3)
关键词
光纤耦合
光纤列阵
单根光纤
激光技术
Fiber coupling
Fiber array
Single fiber
Laser technology
