High average power YAG lasers and applications

Hirotaka Kanazawa; Akihiro Nishimi; Minoru Uehara; Keinosuke Maeda; Yutaka Wakasa

doi:10.1117/12.270267

4 April 1997 High-average-power YAG lasers and applications

Hirotaka Kanazawa, Akihiro Nishimi, Minoru Uehara, Keinosuke Maeda, Yutaka Wakasa

Proceedings Volume 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1997) https://doi.org/10.1117/12.270267
Event: XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, 1996, Edinburgh, United Kingdom

Abstract

A novel multi-rod cw Nd:YAG laser with 4 kW output power through an optical fiber has been developed. We adopted a unique YAG rod arrangement which minimizes the distance between adjacent rods. By using such a resonator, the laser output power of 4.8 kW was extracted from the laser resonator at an oscillation efficiency of 3.9%. The fiber power transmission with a fused silica fiber of 1.0 mm diameter is possible for the delivered laser power of 4.4 kW with transmission efficiency of about 92%, which is the same as a theoretical reflection loss at end surfaces. Welding experiments using the developed 4 kW YAG laser with a fiber- connected multi-joint robots showed excellent performance of 10 mm penetration for stainless steel welding and of more than 4 mm penetration for aluminum alloys.

Citation Download Citation

Hirotaka Kanazawa, Akihiro Nishimi, Minoru Uehara, Keinosuke Maeda, and Yutaka Wakasa "High-average-power YAG lasers and applications", Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); https://doi.org/10.1117/12.270267

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