应用于金属焊接的光纤耦合输出2kW半导体激光光源  

Fiber Coupled 2kW Semiconductor Laser for the Application of Welding of Metals

作　　者：付喜宏[1] 彭航宇[1] 王彪[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所发光学及应用国家重点实验室,长春130033

出　　处：《激光杂志》2014年第12期68-71,共4页Laser Journal

基　　金：国家863计划项目(2012AA040210);国家自然科学基金项目(61306060)资助

摘　　要：报道了一种高效节能、千瓦级光纤柔性输出半导体激光焊接光源。采用半导体激光合束技术,研制出2246W半导体激光合束光源,电光效率达43.6%;通过聚焦耦合,实现从600μm芯径、数值孔径0.2的光纤连续输出功率为2104W,光纤耦合效率达93.7%;在光纤输出端采用放大率1颐1的成像系统,到达工件表面的功率为2084W,光参量积为46.89mm·mrad,在束腰处测得光斑直径600μm,光功率密度为7.37×105 W/cm2。A fiber-coupled kW-class semiconductor laser for welding with high efficiency was reported. By adop_ting the laser beam combining technology, semi-conductor laser with output power of 2246W and wall-plug efficiency of 43. 6% was developed. Then through foucusing and coupling, output power of 2104W was obtained from a fiber with core diameter of 600μm and numerical aperture of 0 . 2 . The coupling efficiency reached 93 . 7%. At the end of the fiber, an imaging system with the magnification of 1 was used and the final laser power on the workpiece surface was 2084W. The beam parametric product of the laser was 46. 89mm·mrad and the spot diameter at the beam waist was 600μm. The power density was 7. 37Χ105 W/cm2 which could satisfy the requirement of the sheet metal welding.

关 键 词：半导体激光 光纤耦合 激光合束 激光焊接 

分 类 号：TN248.4[电子电信—物理电子学]