High-power high-brightness diode-pumped solid state laser for precise laser processing

Shuichi Fujikawa; Keisuke Furuta; Masaki Seguchi; Tetsuo Kojima; Yushi Takenaka; Koji Yasui

doi:10.1117/12.456903

25 February 2002 High-power high-brightness diode-pumped solid state laser for precise laser processing

Shuichi Fujikawa, Keisuke Furuta, Masaki Seguchi, Tetsuo Kojima, Yushi Takenaka, Koji Yasui

Proceedings Volume 4426, Second International Symposium on Laser Precision Microfabrication; (2002) https://doi.org/10.1117/12.456903
Event: Second International Symposium on Laser Precision Micromachining, 2001, Singapore, Singapore

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 .

Citation Download Citation

Shuichi Fujikawa, Keisuke Furuta, Masaki Seguchi, Tetsuo Kojima, Yushi Takenaka, and Koji Yasui "High-power high-brightness diode-pumped solid state laser for precise laser processing", Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); https://doi.org/10.1117/12.456903

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KEYWORDS

Nd:YAG lasers

Diode pumped solid state lasers

Copper

Laser drilling

High power lasers

Solid state lasers

Laser processing

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