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Proceedings Paper

Observation of laser-induced air plasma by pulsed CO2 laser with an ICCD camera
Author(s): Jian Tang; Zhixian Jiu; Chenguang Yang; Duluo Zuo; Zuhai Cheng
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Paper Abstract

In order to know more about the mechanism of laser propulsion, the temporal evolvement and spatial distribution of the air plasma produced by a Transversely Excited Atmospheric (TEA) pressure CO2 laser were investigated with a image intensified charged coupled device (ICCD) camera. The energy of the TEA CO2 laser was 5 ~ 6 J, with pulse FWHM of 100 ns at 10.6 μm, trailing approximately 2 μs. The experimental results indicated that the radial evolution was almost symmetrical but the axial evolution was not. During the development stage of the breakdown, the laser-absorption region was propagated along the beam axis in the direction opposite beam incidence. The axial length of plasma and the maximal intensity of the laser-induced plasma were investigated, which could vary with the laser power. The propagation speed of the laser-induced plasma was about 104 m/s at the initial stage of breakdown, and then the propagation speed of the laser-induced plasma decreased gradually.

Paper Details

Date Published: 18 February 2009
PDF: 7 pages
Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 72760F (18 February 2009); doi: 10.1117/12.821602
Show Author Affiliations
Jian Tang, Huazhong Univ. of Science and Technology (China)
Zhixian Jiu, Huazhong Univ. of Science and Technology (China)
Chenguang Yang, Huazhong Univ. of Science and Technology (China)
Duluo Zuo, Huazhong Univ. of Science and Technology (China)
Zuhai Cheng, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7276:
Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications

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