High-power CO2 blending-mode laser beam propagation and focus due to phase shifts

Zhiyong Wang; Tao Chen; Yue Ding; Xibin Wang; Tiechuan Zuo

doi:10.1117/12.308068

12 May 1998 High-power CO₂ blending-mode laser beam propagation and focus due to phase shifts

Zhiyong Wang, Tao Chen, Yue Ding, Xibin Wang, Tiechuan Zuo

Proceedings Volume 3268, Gas and Chemical Lasers and Intense Beam Applications; (1998) https://doi.org/10.1117/12.308068
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

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.

Citation Download Citation

Zhiyong Wang, Tao Chen, Yue Ding, Xibin Wang, and Tiechuan Zuo "High-power CO₂ blending-mode laser beam propagation and focus due to phase shifts", Proc. SPIE 3268, Gas and Chemical Lasers and Intense Beam Applications, (12 May 1998); https://doi.org/10.1117/12.308068

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