Experimental observation and numerical simulation of surface topography evolution in LP. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Experimental observation and numerical simulation of surface topography evolution in LP.

Caption

Experimental observation and numerical simulation of surface topography evolution in LP. a, Real-time and in situ observation of LP using OTS-QI. Temporally stretched femtosecond pulses are split into two paths, one for signal detection and the other as the reference. The pulses in the signal path are spatially dispersed and focused onto the polishing area. After recording the surface topography evolution during LP, the pulses are spatially recombined and coupled with the reference pulses for photodetection later. Finally, the images of the temporal evolution during LP are recovered by digital signal processing. b, Positional relationship between the CO2 laser irradiated on the sample and probe pulse. c, Multi-physics model used to numerically analyse the dynamic process in LP, where heat transfer, phase change, microflow, and evaporation are considered.

Credit

by Du Wang, Mingjie Yu, Yifan Yao, Shaoyi Wang, Yueyun Weng, Shuang Zhao, Fei Fan, Keisuke Goda, Sheng Liu, Zongqing Zhao, and Cheng Lei

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Credit must be given to the creator.

License

CC BY

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