High-power and high-beam-quality diode-pumped solid state Nd:YAG laser

Masaki Seguchi; Shuichi Fujikawa; Tetsuo Kojima; Keisuke Furuta; Yushi Takenaka; Jun-ichi Nishimae

doi:10.1117/12.540750

18 November 2003 High-power and high-beam-quality diode-pumped solid state Nd:YAG laser

Masaki Seguchi, Shuichi Fujikawa, Tetsuo Kojima, Keisuke Furuta, Yushi Takenaka, Jun-ichi Nishimae

Proceedings Volume 5063, Fourth International Symposium on Laser Precision Microfabrication; (2003) https://doi.org/10.1117/12.540750
Event: Fourth International Symposium on Laser Precision Microfabrication, 2003, Munich, Germany

Abstract

We have achieved a high-quality beam generation wih highly efficient quasi-cw Nd:YAG laser over 1-kW with a novel side-pumping configuration using micro-lens free diode-stacks as a part of "Advanced Photon Processing and Measurement Technologies" program. We have demonstrated a power scaling of Nd:YAG rod laser over 1 kW while maintaining high-beam-quality and high-efficiency by cascaded-coupling of two identical bifocusing compensation resonators. Laser power of 1050W was obtained with the beam quality of M² = 8 at the electric-to-optical efficiency of 23%. In this work, we also demonstrated the focusing ability of less than 50 μm diameter on the focal plane by using a f50mm lens (N.A. 0.2). Moreover, with driving AO-Q switch in burst mode operation, over 2MW pulse peek is demonstrated.

Citation Download Citation

Masaki Seguchi, Shuichi Fujikawa, Tetsuo Kojima, Keisuke Furuta, Yushi Takenaka, and Jun-ichi Nishimae "High-power and high-beam-quality diode-pumped solid state Nd:YAG laser", Proc. SPIE 5063, Fourth International Symposium on Laser Precision Microfabrication, (18 November 2003); https://doi.org/10.1117/12.540750

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