Three-dimensional temperature distribution and modification mechanism in glass during ultrafast laser irradiation at high repetition rates
Autor: | Masahiro Yamaji, Masatoshi Ohnishi, Masaaki Sakakura, Kiyotaka Miura, Kazuyuki Hirao, Yasuhiko Shimotsuma, Masahiro Shimizu |
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Rok vydání: | 2012 |
Předmět: |
Optics and Photonics
Materials science Transmission loss Viscoelastic Substances Molecular physics law.invention Optics law Sodium Hydroxide Irradiation business.industry Lasers Silicates Temperature Laser beam welding Oxides Molar absorptivity Calcium Compounds Models Theoretical Laser Atomic and Molecular Physics and Optics Nonlinear Dynamics Thermodynamics Glass Deformation (engineering) business Ultrashort pulse Beam (structure) |
Zdroj: | Optics express. 20(2) |
ISSN: | 1094-4087 |
Popis: | We experimentally determined the three-dimensional temperature distribution and modification mechanism in a soda-lime-silicate glass under irradiation of ultrafast laser pulses at high repetition rates by analyzing the relationship between the morphology of the modification and ambient temperature. In contrast to previous studies, we consider the temperature dependence of thermophysical properties and the nonlinear effect on the absorbed energy distribution along the beam propagation axis in carrying out analyses. The optical absorptivity evaluated with the temperature distribution is approximately 80% and at most 3.5% smaller than that evaluated by the transmission loss measurement. The temperature distribution and the strain distribution indicate that visco-elastic deformation and material flow play important roles in the laser-induced modification inside a glass. |
Databáze: | OpenAIRE |
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