1998•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access
High-power CO 2 blending-mode laser beam propagation and focus due to phase shifts
Zhiyong Wang, Tao Chen, Yue Ding, Xibin Wang, Tiechuan Zuo
Open publisher page 2 citations
Abstract
In laser materials processing, the transverse intensity distribution of focus affects processing quality greatly. In this paper, phase shifts is used to analyze high-power CO2 laser beam propagation and focus, especially the change of transverse intensity distribution along beam propagation path. From theory, the phase shifts of high-power blending laser beam determines the transverse intensity distribution. It is also found that if there contains odd mode in blending laser beam, the asymmetry of laser beam is broken. Moreover the high-power laser beam focus and unfocused diagnosis system UFF100 is used to test the beam transverse intensity distribution. Theory is accord with measurement. According to the theory, two optical transformation system is designed to attain the minimum intensity changes.