High-power laser-fibers structure for surface ablation cleaning under complicated circumstance

Xianglin Zhou; Kazuo Imasaki; Hiroyuki Furukawa; Hideo Umino; Kohji Sakagishi; Sadao Nakai; Chiyoe Yamanaka

doi:10.1117/12.405253

25 October 2000 High-power laser-fibers structure for surface ablation cleaning under complicated circumstance

Xianglin Zhou, Kazuo Imasaki, Hiroyuki Furukawa, Hideo Umino, Kohji Sakagishi, Sadao Nakai, Chiyoe Yamanaka

Proceedings Volume 4095, Laser Beam Shaping; (2000) https://doi.org/10.1117/12.405253
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

High power Nd:YAG laser beam with wavelength 1.064micrometers , pulse-width 20 and 100 pico-second was focused onto Zn coated target; and separated by beam splitter and delivered via optical fibers. Some key problems of ultra short pulsed high power laser beam transporting in optical fiber were involved and solved; laser ablation effect by laser irradiation and after optical fiber transportation were comparatively studied. Ablation rate was defined as ablated volume to laser fluence and used as a description of ablation ability. The relationship of ablation rate with laser fluence was plotted and optimum condition was found. Corresponding to the optimal condition, ablation effect in cases of 20 and 100 pico- second pulse-width, 90 degree(s) and 20 degree(s) laser incident angles, using spherical lens and cylindrical lens for laser beam focusing was compared respectively. It was shown that if other conditions unchanged, used spherical lens and cylindrical lens, ablation rate was almost same, but it was high as pulse-width equal to 100ps or laser incident angle equal to 90 degree(s) than as 20ps or 20 degree(s) respectively. In addition, laser beam over 5.6 watt, transporting rate near 90 per was output at the end of the optical fiber. Using the laser was this output power, the same thickness Zn coating was completely removed. Basing on this experiment, the possibility of laser surface ablation cleaning under complicated circumstance was confirmed.

Citation Download Citation

Xianglin Zhou, Kazuo Imasaki, Hiroyuki Furukawa, Hideo Umino, Kohji Sakagishi, Sadao Nakai, and Chiyoe Yamanaka "High-power laser-fibers structure for surface ablation cleaning under complicated circumstance", Proc. SPIE 4095, Laser Beam Shaping, (25 October 2000); https://doi.org/10.1117/12.405253

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KEYWORDS

Laser ablation

Optical fibers

Pulsed laser operation

Coating

High power lasers

Spherical lenses

Zinc

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