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Proceedings Paper

Machining with high-brightness lasers
Author(s): Xiangli Chen
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Paper Abstract

Drilling and cutting results using high brightness Nd:YAG lasers are presented and compare with that of conventional Nd:YAG lasers. Materials tested include superalloys, intermetallics, and composites. The master-oscillator-power- amplifier (MOPA) laser system has an average power of 100 W and about 1.2 diffraction-limited beam quality. It is Q- switched and/or modelocked. Hence pulse lengths are in the hundreds of picoseconds to hundreds of nanoseconds range, resulting in beam intensities of 108 - 109 W/cm2. It is shown that the shortening of pulse length and the subsequent increase in beam intensity result in much thinner recast layers and heat affected zones (HAZ), less microcracking or delamination of materials, and much better geometry stability. Both the fundamental 1064 nm and the second harmonic wavelength of 532 nm are tested, showing substantial additional advantage for the shorter wavelength.

Paper Details

Date Published: 14 September 1998
PDF: 7 pages
Proc. SPIE 3343, High-Power Laser Ablation, (14 September 1998); doi: 10.1117/12.321612
Show Author Affiliations
Xiangli Chen, General Electric Co. (China)

Published in SPIE Proceedings Vol. 3343:
High-Power Laser Ablation
Claude R. Phipps, Editor(s)

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