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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.
ISSN: 2196-7229
DOI: 10.1007/s40516-019-0080-z
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:
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles
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