Nd-glass laser for deep-penetration welding and hardening

Serguei V. Kayukov; Sergey I. Yaresko; Pavel Anatolievich Mikheyev

doi:10.1117/12.382770

14 April 2000 Nd-glass laser for deep-penetration welding and hardening

Serguei V. Kayukov, Sergey I. Yaresko, Pavel Anatolievich Mikheyev

Proceedings Volume 3929, Solid State Lasers IX; (2000) https://doi.org/10.1117/12.382770
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States

Abstract

Pulsed Nd-glass lasers usually have low beam quality (200 - 300 mm-mrad), and are used only for surface hardening of metals. However, high pulse energy make them feasible for deep penetration welding if their beam quality could be improved. We investigated beam properties of Nd-glass laser with unstable resonator with semitransparent output coupler (URSOC). We had found that beam divergence of the laser with URSOC was an order of magnitude smaller than that of the laser with stable resonator. The achieved beam quality (40 - 50 mm-mrad) permitted to perform deep penetration welding with the aspect ratio of approximately 8. For beam divergence of 3 mrad melt depth of 6.3 mm was achieved with the ratio of depth to pulse energy of 0.27 mm/J.

Citation Download Citation

Serguei V. Kayukov, Sergey I. Yaresko, and Pavel Anatolievich Mikheyev "Nd-glass laser for deep-penetration welding and hardening", Proc. SPIE 3929, Solid State Lasers IX, (14 April 2000); https://doi.org/10.1117/12.382770

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