高功率激光器的光束质量及其对激光加工的影响

The beam quality of high power lasers and its infl uences on the laser processing

本文介绍了光束的模式、评价光束质量的几种方法，着重介绍了国际标准化组织（ＩＳＯ）提出的光束传输系数Ｍ作为评价光束质量的方法。文中还讨论了光束质量对焊接、切割加工的影响；热透镜效应对加工的影响等。

This paper presents the beam mode,some methods for evaluating beam quality. As put forward by International Organization forStandardization, here the method to use beam propagation factor M for evaluating beamquality has been dis-cussed. The influences of laser beam quality and the thermal effect of lens oii the laser welding,cutting and laser processing are also described.