23 February 2006 Concrete cutting using high-power fiber laser
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We have demonstrated the measurements of attenuation constant of a multi-mode fiber (300μm core diameter and 1km length) at 1070nm. The observed attenuation constant was below 0.7dB/km. The laser power of 5kW was coupled into the 1km fiber at 1070nm. The overall transmittance was 85 %. We observed the first Raman stokes in the transmitted laser spectrum. We demonstrated concrete cutting with a 4kW fiber laser at 1070nm. The demonstrated slab thickness was 100mm. This technique can be extended to thick concrete slabs more than 1m without laser power increasing.
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Kazuyoku Tei, Kazuyoku Tei, Nriyuki Takeuchi, Nriyuki Takeuchi, Daichi Sugimoto, Daichi Sugimoto, Takashi Arisawa, Takashi Arisawa, Kazuya Jyosui, Kazuya Jyosui, Naoomi Miyagawa, Naoomi Miyagawa, Tomoo Fujioka, Tomoo Fujioka, "Concrete cutting using high-power fiber laser", Proc. SPIE 6101, Laser Beam Control and Applications, 61011T (23 February 2006); doi: 10.1117/12.646364; https://doi.org/10.1117/12.646364


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