An attenuator arranged in a V-shape beam splitter to make a balanced ring profile

Kazunori Komori; Masaki Takemoto; Kyohei Maeda; Toshifumi Ogawa

doi:10.1117/12.3001309

12 March 2024 An attenuator arranged in a V-shape beam splitter to make a balanced ring profile

Kazunori Komori, Masaki Takemoto, Kyohei Maeda, Toshifumi Ogawa

Proceedings Volume 12878, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems XIII; 1287804 (2024) https://doi.org/10.1117/12.3001309
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

It is known that a ring profile using a double-core fiber is effective for decreasing spatter and improves penetration stability for copper and aluminum welding. We considered creating a ring profile with an axicon lens and a single-core laser instead of a double-core laser. However, the light emitted from the delivery fiber is sometimes biased, and thus our ring profile becomes unbalanced beam. In order to correct unbalanced beam, we made a tilt correction mechanism and an alignment profiler. This alignment profiler is detachable and has an attenuator, ND filter and damper. Two beam splitters used for the attenuator were arranged in V-shape, because we have to measure, not collimated light but condensed light. V-shape is able to cancel the transmittance bias of the beam splitter because it has a different transmittance by the incident angle dependence. And furthermore, in order to correct astigmatism caused by V-shape beam splitters, the scale in the beam splitter direction was corrected by the software for the axial direction perpendicular to the beam splitter. By developing such a device, it was possible to visualize the unbalanced state of the ring, and corrected the unbalanced ring to a balanced ring. Thereby, we studied the spatters and penetration stability about copper welding.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Kazunori Komori, Masaki Takemoto, Kyohei Maeda, and Toshifumi Ogawa "An attenuator arranged in a V-shape beam splitter to make a balanced ring profile", Proc. SPIE 12878, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems XIII, 1287804 (12 March 2024); https://doi.org/10.1117/12.3001309

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