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Direct observation of the temperature field during ablation of materials by multiple femtosecond laser pulses |
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| Authors: | D.V. Tran Y.C. Lam H.Y. Zheng B.S. Wong |
| Affiliation: | a Singapore-MIT Alliance, N2-B2C-15, 50 Nanyang Avenue, Singapore 639798, Singapore b School of Mechanical and Aerospace Engineering, 50 Nanyang Avenue, Singapore 639798, Singapore c The University of New South Wales Asia, 1 Kay Siang Road, Singapore 248922, Singapore d Singapore-MIT Alliance & Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA |
| Abstract: | We report a direct observation of the temperature field on a steel specimen during ablation by multiple femtosecond laser pulses using an infrared thermography technique. From the experimental results and simulation study of the temperature field, we quantified the deposited thermal power into the specimen during the ablation process. We found that more than two thirds of the incident laser power was deposited in the steel specimen when ablated by multiple femtosecond laser pulses. This result provides further understanding of the heating effect in materials processing by ultrashort laser pulses. |
| Keywords: | 79.20.Ds 81.05 |
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