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Proceedings Paper

Studies on high energy pulsed CO2 laser
Author(s): Duluo Zuo; Zuhai Cheng
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Paper Abstract

The recent results on pulsed CO2 laser, including the effects of preionization structure, electrode profile, and discharge circuit are reported. Two sizes of discharge gap, 70 mm and 100 mm were selected. For the 70 mm gap, lateral preionization was used; for the 100 mm gap, preionization beneath the meshed electrode, and mixed preionization beneath and beside the electrodes were all tested. Strong lateral discharge was found in the case of near-Rogowski profile or Stappaerts profile, and strong central discharge was found in the case of Ernst profile. When the near- Rogowski profiled electrode was paired with an Ernst profiled electrode, better performance was obtained. Discharge distribution corresponding to the spark pins under the mesh grid was found obviously, which means that the uniformity of preionization should be further improved. Small signal gain coefficient was measured to evaluate the discharge. For the experimental setup with 70 mm discharge gap and 4 liters discharge volume, the highest small signal gain coefficient was 2.94% cm-1. When a laser cavity was installed, the highest pulsed energy obtained from this setup was 169 J. When the discharge volume was enlarged to 16 liters, pulsed laser energy up to 580 J was obtained.

Paper Details

Date Published: 18 February 2009
PDF: 9 pages
Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 72761D (18 February 2009); doi: 10.1117/12.823318
Show Author Affiliations
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
Peixiang Lu; Katsumi Midorikawa; Bernd Wilhelmi, Editor(s)

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