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Proceedings Paper

Drilling with a novel high-power Q-switch pulse laser
Author(s): Qiang Li; Yijun Zhen; Zhiyong Wang; Xiaobin Zhang; Tiechuan Zuo
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Paper Abstract

This paper reports on the characterization and analysis of drilling with a novel high power acousto-optical Q-switch pulse laser. The laser is a flash-lamp pumped pulse Nd:YAG laser which can be used in the free running mode with repetition rates up to 10Hz. Additionally it is possible to modulate these pulses using acousto-optical modulator which enables a burst between 1 and 10 Q-switch pulses with a duration of typically 200ns during each flash-lamp pulse. The repetition rate of the burst is 5kHz-50kHz, the pulse energy is 30-8OmJ, and the peak power is more than 400kW with a beam parameter product of about 5mm mrad. The drilling process and the combination of different repetition rate of the bursts enables drilling 2.5mmthick Cu and Ni-alloy for 0.2mm micro-hole. The recast layer is nanower. Oxidation of the walls of the hole is prevented by a high-pressure inert gas.

Paper Details

Date Published: 12 September 2002
PDF: 6 pages
Proc. SPIE 4915, Lasers in Material Processing and Manufacturing, (12 September 2002); doi: 10.1117/12.482914
Show Author Affiliations
Qiang Li, Beijing Polytechnic Univ. (China)
Yijun Zhen, Beijing Polytechnic Univ. (China)
Zhiyong Wang, Beijing Polytechnic Univ. (China)
Xiaobin Zhang, Beijing Aeronautical Manufacturing Technology Research Institute (China)
Tiechuan Zuo, Beijing Polytechnic Univ. (China)

Published in SPIE Proceedings Vol. 4915:
Lasers in Material Processing and Manufacturing
ShuShen Deng; Tatsuo Okada; Klaus Behler; XingZong Wang, Editor(s)

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