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Proceedings Paper

High-power high-brightness diode-pumped solid state laser for precise laser processing
Author(s): Shuichi Fujikawa; Keisuke Furuta; Masaki Seguchi; Tetsuo Kojima; Yushi Takenaka; Koji Yasui
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Paper Abstract

We have proposed a highly efficient and high-brightness quasi-cw Nd:YAG rod laser with a novel-side-pumping design using micro-lens free diode-stacks. We achieved 320W output power with 28-% electrical-to-optical efficiency, which is, to our knowledge, the highest efficiency reported for diode- pumped solid-state lasers. We generated the high quality beam of M2equals4 with the output power of 500W while maintaining the electrical-to-optical efficiency of 20%. We also demonstrated through-hole formation of 1mm thick copper plate using the high brightness laser beam and successfully obtained round holes with the diameter of less than 40 micrometers .

Paper Details

Date Published: 25 February 2002
PDF: 3 pages
Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); doi: 10.1117/12.456903
Show Author Affiliations
Shuichi Fujikawa, Mitsubishi Electric Corp. (Japan)
Keisuke Furuta, Mitsubishi Electric Corp. (Japan)
Masaki Seguchi, Mitsubishi Electric Corp. (Japan)
Tetsuo Kojima, Mitsubishi Electric Corp. (Japan)
Yushi Takenaka, Mitsubishi Electric Corp. (Japan)
Koji Yasui, Mitsubishi Electric Corp. (Japan)

Published in SPIE Proceedings Vol. 4426:
Second International Symposium on Laser Precision Microfabrication
Isamu Miyamoto; Yong Feng Lu; Koji Sugioka; Jan J. Dubowski, Editor(s)

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