12 May 1998 High-power CO2 blending-mode laser beam propagation and focus due to phase shifts
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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.
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Zhiyong Wang, Zhiyong Wang, Tao Chen, Tao Chen, Yue Ding, Yue Ding, Xibin Wang, Xibin Wang, Tiechuan Zuo, 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); doi: 10.1117/12.308068; https://doi.org/10.1117/12.308068
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