Laser transmission welding (LTW) is nowadays a well-received polymer joining process. New applications are emerging more and more due to the unique advantages of LTW over conventional joining processes. This paper provides a comprehensive review on various aspects of LTW techniques through a detailed survey of several scholarly publications, industrial studies, scientific reports, etc. This review focuses primarily on five major aspects of LTW, which are (a) welding parameters and their effects, (b) weld quality attributes, (c) process monitoring techniques, (d) material combinations, and (e) industrial applications. After an introduction to the process, the welding parameters, and how they influence the LTW process are described first. This is followed by a description of the quality attributes of LTW, including weld strength, weld pool dimensions, part gap-bridging ability, meltdown, and weld morphology. Several process monitoring techniques applied to LTW are then discussed for pre-, post-, and real-time monitoring of the process. Subsequently, material combinations that are successfully welded using LTW are described, including welding of polymer to polymer, metal, ceramic, glass, wood, etc. Finally, several applications of LTW in different industrial sectors are identified, and the results of the review are concluded.

如今，激光透射焊接（LTW）是一种广受欢迎的聚合物连接工艺。由于LTW相对于常规连接工艺的独特优势，越来越多的新应用正在涌现。本文通过对若干学术出版物，工业研究，科学报告等的详细调查，对LTW技术的各个方面进行了全面的综述。该综述主要关注LTW的五个主要方面，即（a）焊接参数及其影响。 ，（b）焊接质量属性，（c）过程监控技术，（d）材料组合以及（e）工业应用。在介绍了该过程之后，首先说明焊接参数及其对LTW过程的影响。接下来是LTW的质量属性的描述，包括焊接强度，焊缝尺寸，零件间隙桥接能力，熔化和焊缝形态。然后讨论了应用于LTW的几种过程监视技术，以进行过程的前，后和实时监视。随后，描述了使用LTW成功焊接的材料组合，包括将聚合物焊接到聚合物，金属，陶瓷，玻璃，木材等。最后，确定了LTW在不同工业领域的几种应用，并给出了审查结果。结论。