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Proceedings Paper

Remote optical power and focus monitoring in pulsed Nd:YAG laser welding
Author(s): Cheol-Jung Kim; Sung-Hoon Baik; Min Seok Kim; Chin-Man Chung
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Paper Abstract

The thermal radiation from the weld-pool is measured at two wavelengths through the laser delivery fiber between Nd:YAG laser pulses. The chromatic aberration of delivery optics has been optimized to detect the variation of weld bead width. The design of optics and the signal processing algorithm for optical monitoring is described. Furthermore, the applications of optical monitoring to the detection of power variation and focus shift are shown.

Paper Details

Date Published: 4 April 1997
PDF: 4 pages
Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); doi: 10.1117/12.270126
Show Author Affiliations
Cheol-Jung Kim, KAERI (South Korea)
Sung-Hoon Baik, Korea Atomic Energy Research Institute (South Korea)
Min Seok Kim, Korea Atomic Energy Research Institute (South Korea)
Chin-Man Chung, Korea Atomic Energy Research Institute (South Korea)


Published in SPIE Proceedings Vol. 3092:
XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference
Denis R. Hall; Howard J. Baker, Editor(s)

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