Measurement and numerical simulation of transverse modes in high power transverse-flow CO2 laser with tube-plate electrodes

Xu Zhousu; Cheng Cheng; Yao Jianhua

doi:10.3788/HPLPB20132502.0319

Volume 25 Issue 02

Dec. 2012

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(02): 319-324

Ge Meng, Wang Yong. Cold test simulation method for double-gap output circuit with double coupling apertures[J]. High Power Laser and Particle Beams, 2013, 25: 675-679. doi: 10.3788/HPLPB20132503.0675

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Xu Zhousu, Cheng Cheng, Yao Jianhua. Measurement and numerical simulation of transverse modes in high power transverse-flow CO2 laser with tube-plate electrodes[J]. High Power Laser and Particle Beams, 2013, 25: 319-324. doi: 10.3788/HPLPB20132502.0319

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Measurement and numerical simulation of transverse modes in high power transverse-flow CO2 laser with tube-plate electrodes

doi: 10.3788/HPLPB20132502.0319

1.
Institute of Intelligent Optoelectronic Technology,Zhejiang University of Technology,Hangzhou 310023,China;
2.
Research Center of Laser Processing Technology and Engineering,Zhejiang University of Technology,Hangzhou 310023,China

Received Date: 2012-05-21
Rev Recd Date: 2012-09-14
Publish Date: 2013-02-10

Abstract

Abstract

In order to control lasing transverse mode, improve laser mode stability, and enhance laser processing quality, the transverse modes of a high power transverse-flow CO2 laser are measured experimentally, and the mechanism of formation of laser transverse modes is analyzed theoretically. The lasing transverse energy distribution of a high power tube-plate transverse-flow CO2 laser is simulated numerically by solving the space-time resolving rate equations derived from the discharging field determined by Maxwells equations. The result shows that the simulated lasing distribution agrees with the experimental observation. Moreover, there is evidence to show that the electrode configuration in the CO2 laser resonator determines the peak value of lasing transverse modes, while the gas flowing rate determines the lasing gain peak and the peak position along the gas flowing direction.
- high power transverse flow CO2 laser,
- transverse mode measurement,
- laser energy distribution,
- electric field configuration,
- laser kinetics,
- gas flow rate

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