Shigeki Fujinaga
Papers
3
Total Citations
14
H-Index
3
About
Shigeki Fujinaga is a laser engineering researcher whose work has focused on advancing high-power YAG (yttrium–aluminum–garnet) laser systems and their industrial applications in materials processing. His most notable contributions center on the development and optimization of beam-combining technologies, where multiple laser oscillators are integrated to achieve significantly higher average output powers than any single unit could deliver alone. Fujinaga's landmark 1997 study introduced a sophisticated system merging beams from three YAG laser oscillators — including a newly developed 1.5 kW pulsed oscillator alongside two 2 kW continuous-wave units — achieving a combined output of 5.5 kW total average power. This work, his most cited with 8 citations, demonstrated practical integration with robotic control systems, pushing the boundaries of laser welding capabilities. His subsequent 1999 research further refined multi-beam transmission through optical fibers and explored the characteristics of combining beams at focal points, addressing key engineering challenges such as beam inclination and plume behavior during welding. Though operating within a specialized niche, Fujinaga's research has contributed meaningful groundwork to high-power industrial laser technology, offering insights that remain relevant to researchers and engineers seeking scalable, high-performance laser processing solutions.
Research Focus
Key Achievements
Top Papers
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