4 January 2008 Square laser beam of high power transverse flow CO2 laser and its application
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By means of the Collins formula and finite-element method, diffraction integral equation of the square resonator with spherical mirrors is transformed to the finite-element matrix equation, mode-fields of the square aperture resonator is calculated. Experiment with square aperture resonator is done on HUST2000 high power transverse flow CO2 laser. The results show that a square multi-mode beam with uniform comparatively intensity appeares in near field distribution. Laser quenching on 45# steel is done by using the square multi-mode beam and general circle beam. The hardened case caused by the square multi-mode beam is more uniform than general circle beam.
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Yingxiong Qin, Yingxiong Qin, Xiahui Tang, Xiahui Tang, Rutao Zhong, Rutao Zhong, Zhengjia Li, Zhengjia Li, } "Square laser beam of high power transverse flow CO2 laser and its application", Proc. SPIE 6825, Lasers in Material Processing and Manufacturing III, 68250W (4 January 2008); doi: 10.1117/12.757416; https://doi.org/10.1117/12.757416


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