高功率直接二极管激光器（HPDDL）系统的输出功率大于4.0kW，封装紧凑，性能稳定。这些工业半导体（二极管、固态）激光器是一种新型热源，正开始取代传统的激光用于缝焊应用。HPDDL系统的波束形状为矩形或线源。这种梁的外形不需要锁孔，因此产生了更高质量的缝焊工艺。由于效率高，这些HPDDL非常紧凑，可以直接安装在管磨机或机器人上，实现黑色金属和有色金属的高速高质量焊接。这些全固态激光系统固有地提供了控制输出激光能量的能力，其程度是传统钕无法比拟的: YAG和CO（sub2）激光器。

High Power Direct Diode Laser (HPDDL) systems with output powers greater than 4.0kW in a compact robust package are now available. These industrial semiconductor (diode, solid state) lasers are a new type of heat source, which are beginning to replace conventional lasers for seam welding applications. The beam shape of the HPDDL systems are rectangular or a line source. This beam profile does not key-hole, thus yielding higher quality seam welding process. Due to their high efficiency, these HPDDL are very compact and can be mounted directly on a tube mill or robot enabling high speed and high quality welding of both ferrous and nonferrous metals. These all solid state laser systems inherently provide the ability to control the output laser energy with a degree that is unmatched by conventional Nd:YAG and CO(sub2) lasers.