Experimental Research on the Influence of Laser-induced Plasma on the Beam Focusing During High-power CO_2 Laser Materials Processing

XIAO Rongshi; ZUO Tiechuan; R. Volz

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Experimental Research on the Influence of Laser-induced Plasma on the Beam Focusing During High-power CO_2 Laser Materials Processing

机译：大功率CO_2激光材料加工中激光诱导等离子体对光束聚焦影响的实验研究

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A experimental method was developed to verify the effect of plasma on the focused beam propagation according to the basic fact that the plasma sustains for a while even when the laser beam moves off the workpiece at high power. It is found that the focus spot enlarges and the position of the focus shifts due to the effects of the plasma. This "lensing effect" of the laser induced plasma becomes more serious with the increase of the distance of plasma propagation. It is concluded that the "lensing effect" of plasma, other than plasma absorption, is the main mechanism for plasma shielding.

机译：根据基本事实，即使激光束以高功率从工件上移开，等离子体也能维持一段时间，因此开发了一种实验方法来验证等离子体对聚焦光束传播的影响。发现由于等离子体的影响，焦点扩大并且焦点的位置移动。随着等离子体传播距离的增加，激光诱导等离子体的这种“透镜效应”变得更加严重。可以得出结论，除吸收等离子体外，等离子体的“透镜效应”是等离子体屏蔽的主要机理。

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来源
《Chinese Journal of Lasers. B》 |1998年第6期|p.550-554|共5页
作者
XIAO Rongshi; ZUO Tiechuan; R. Volz;
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正文语种 eng
中图分类激光技术、微波激射技术;
关键词
CO_2 laser materials processing; plasma shielding; lensing effect of plasma;

机译：CO_2激光材料加工;等离子屏蔽等离子透镜效应;

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1. Significant enhancement in self-focusing of high-power laser beam through dense plasmas by ramp density profile [J] . Habibi M., Ghamari F. Journal of the Optical Society of America, B. Optical Physics . 2015,第7期

机译：斜坡密度分布显着增强了高功率激光束通过致密等离子体的自聚焦能力
2. Atmospheric thermal lens induced by high-power CO2 laserbeams in laser materials processing [J] . Wang Z.Y., Chen K., Chen T., IEEE Journal of Quantum Electronics . 2001,第2期

机译：大功率二氧化碳激光束在激光材料加工中产生的大气热透镜
3. Influence of femtosecond laser pulse repetition rate on thermochemical laser-induced periodic surface structures formation by focused astigmatic Gaussian beam [J] . Dostovalov A. V, Okotrub K. A., Bronnikov K. A., Laser physics letters . 2019,第2期

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4. Experimental research on the influence of laser-induced plasma on beam focusing during high-power CO2 laser materials processing [C] . Tiechuan Zuo, Beijing Polytechnic Univ., Beijing, Conference on gas and chemical lasers and intense beam applications . 1998

机译：大功率CO2激光材料加工中激光等离子体对光束聚焦影响的实验研究
5. A study of the influence of process parameter variations on the material properties and laser damage performance of ion beam sputtered Sc2O3 and HfO2 thin films. [D] . Langston, Peter F. 2016

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6. In-situ characterization of nanoparticle beams focused with an aerodynamic lens by Laser-Induced Breakdown Detection [O] . F.-A. Barreda, C. Nicolas, J.-B. Sirven, -1

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8. Validation of the Aerosol Beam-Focused Laser-Induced Plasma Spectrometer (ABF-LIPS) for Metal Emission Characterization [R] . Ruiz, N., Kornuc, J., Cheng, M. 2010

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Experimental Research on the Influence of Laser-induced Plasma on the Beam Focusing During High-power CO_2 Laser Materials Processing

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