（1. 北京工业大学激光工程研究院，北京 100124； 2. 北京市数字化医疗 3D 打印研究中心，北京 100124）
Application of Lasers in Additive Manufacturing
CHEN Jimin 1,2, ZHANG Chengyu 1,2
(1. Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China; 2. Beijing Digital Medical 3D Printing Research Center, Beijing 100124, China)
Abstract： In order to fully understand the influence of laser on additive manufacturing, the types of lasers widely used in additive manufacturing were reviewed, and important parameters related to additive manufacturing were analyzed for each type of laser. In addition, the advantages and limitations of each laser in additive manufacturing were inspected. For each additive manufacturing method, the latest progress of applicable lasers was introduced. The future of laser-based additive manufacturing was discussed at the end. Conclusion: CO2 and Nd:YAG lasers are still the backbone of various manufacturing technologies; Yb-fiber lasers have advantages such as higher average power, system stability, high parameter tunability, and low maintenance costs, and are gradually replacing Nd:YAG Lasers; although excimer lasers have relatively low beam quality and high cost, they can still be used for additive manufacturing that requires high-power UV laser beams; laser-based additive manufacturing must choose a laser source for additive manufacturing based on target performance.
2020, 
