Material measurement method based on femtosecond laser plasma shock wave
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The acoustic emission signal of laser plasma shock wave, which comes into being when femtosecond laser ablates pure Cu, Fe, and Al target material, has been detected by using the fiber Fabry-Perot (F-P) acoustic emission sensing probe. The spectrum characters of the acoustic emission signals for three kinds of materials have been analyzed and studied by using Fourier transform. The results show that the frequencies of the acoustic emission signals detected from the three kinds of materials are different. Meanwhile, the frequencies are almost identical for the same materials under different ablation energies and detection ranges. Certainly, the amplitudes of the spectral character of the three materials show a fixed pattern. The experimental results and methods suggest a potential application of the plasma shock wave on-line measurement based on the femtosecond laser ablating target by using the fiber F-P acoustic emission sensor probe.
KeywordsOptical fiber sensing femtosecond laser plasma shock wave acoustic signal material testing
The authors gratefully acknowledge the financial support for this work provided by the Dr. Start-up Fund of Hubei University of Science and Technology under Grant No. BK1524 and the Science Research Project in Hubei Province Department of Education under Grant No. B2015077, the National Natural Science Foundation of China (NSFC) under Grant No. 61575148, the Colleges and Universities of Hubei Province Innovation and Entrepreneurship Training Plan under Grant No. 201510927017, No. 201510927018, and the Teaching Reform Program of Hubei University of Science and Technology under Grant No. 2015-XA-007.
- A. Rosencwaig and A. Gersho, “Theory of the photo acoustic effect with solids,” Photoacoustic Effect: Vieweg, 1984, 1(6): 631–636.Google Scholar
- J. S. Lv and H. Qi. “Multi-wavelength narrow line width fiber laser based on distributed feed back fiber lasers,” Photonic Sensors, 2016, 6(3): 256–260.Google Scholar
- S. V. Garnov, V. V. Bukin, A. A. Malyutin, and V. V. Strelkov, “Ultra fast space time and spectrum time resolved diagnostics of multicharged femtosecond laser micro plasma,” in AIP Conference Proceedings, Hawaii, vol. 1153, pp. 37–48, 2009.Google Scholar
- D. Zhong and X. Tong. “Application research on hydraulic coke cutting monitoring system based on optical fiber sensing technology,” Photonic Sensors, 2014, 4(2): 147–151Google Scholar
- T. Maede, E. Ohmura, and I. Miyamoto, “Analysis of key hole behavior in laser welding,” in Proceeding of 6th International Symposium of Japan Welding Society, Nagoya, pp. 104–105, 1998.Google Scholar
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