Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/146696
Title: | Femtosecond laser-induced nonlinear absorption in thick polystyrene | Authors: | Wang, Bing Wang, Xincai Zheng, Hongyu Lam, Yee Cheong |
Keywords: | Engineering::Mechanical engineering | Issue Date: | 2019 | Source: | Wang, B., Wang, X., Zheng, H., & Lam, Y. C. (2019). Femtosecond laser-induced nonlinear absorption in thick polystyrene. Lasers in Manufacturing and Materials Processing, 6(1), 59-66. doi:10.1007/s40516-019-0080-z | Journal: | Lasers in Manufacturing and Materials Processing | Abstract: | The nonlinear absorption behavior of thick polystyrene sample was experimentally investigated and theoretically analyzed. As polystyrene is transparent to the applied laser wavelength, the absorption was mainly through nonlinear absorption by the bulk material. The effective second order nonlinear absorption coefficient (β) was determined with the z scan technique. The nonlinear behavior at different laser powers: 5.2 mW, 10.4 mW, 14.4 mW and 23.5 mW were investigated. The transmittance of laser energy was measured and a significant change was observed with different sample distance from the laser focal plane. By treating the thick polystyrene sample as a stack of thin layers, the effective nonlinear absorption coefficient was determined to be 0.000695 m/W with a standard deviation of 0.000026. | URI: | https://hdl.handle.net/10356/146696 | ISSN: | 2196-7229 | DOI: | 10.1007/s40516-019-0080-z | Schools: | School of Mechanical and Aerospace Engineering | Research Centres: | SIMTech-NTU Joint Laboratory Singapore Institute of Manufacturing Technology |
Rights: | © 2019, Springer Science+Business Media, LLC, part of Springer Nature. This is a post-peer-review, pre-copyedit version of an article published in Lasers in Manufacturing and Materials Processing. The final authenticated version is available online at: http://dx.doi.org/10.1007/s40516-019-0080-z. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | MAE Journal Articles SIMTech Journal Articles |
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