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Proceedings Paper

YAG laser system with combined beams from three oscillators and its application to materials processing
Author(s): Hiroshi Miura; Shigeki Fujinaga; Toru Narikiyo; Akira Ohmori; Keiji Okino; Syuichi Watanabe
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Paper Abstract

We constructed a system in which a newly developed pulse excited YAG laser oscillator of 1.5 kW average power and an integration optics were incorporated, together with two cw YAG laser oscillators of 2 kW average power, a 6-axes articulated robot and a PC. The integration optics summed up three laser beams transmitted through optical fibers and condensed to a focused spot at the focusing point. We could obtain the following results using the system. (1) The focused spot diameter for good welding quality with the integration optics could be available without changing the distance between the specimen and the optics. (2) The delay time between the pulse excited YAG laser beam and the rectangularly modulated cw YAG laser beams should not exceed the time of keyhole formation with the cw laser beams to obtain the maximum penetration depth. (3) The deepest penetration depth and the largest volume of welding could be obtained by the overhead position welding compared with the flat, horizontal and vertical position welding.

Paper Details

Date Published: 4 April 1997
PDF: 4 pages
Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); doi: 10.1117/12.270176
Show Author Affiliations
Hiroshi Miura, Advanced Materials Processing Institute (Japan)
Shigeki Fujinaga, Advanced Materials Processing Institute (Japan)
Toru Narikiyo, Advanced Materials Processing Institute (Japan)
Akira Ohmori, Advanced Materials Processing Institute (Japan)
Keiji Okino, NEC Corp. (Japan)
Syuichi Watanabe, NEC Corp. (Japan)

Published in SPIE Proceedings Vol. 3092:
XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference
Denis R. Hall; Howard J. Baker, Editor(s)

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