Ms. Mingxin Li Profile

Mingxin Li

at Changchun Univ of Science and Technology

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Author

Publications (6)

Proceedings Article | 19 October 2016 Paper

Study on CCD detector irradiated by multi-pulse laser

Mingxin Li, Guangyong Jin, Yong Tan

Proceedings Volume 10152, 1015207 (2016) https://doi.org/10.1117/12.2243823

KEYWORDS: Charge-coupled devices, CCD image sensors, Sensors

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Proceedings Article | 4 March 2015 Paper

Numerical simulation of different pulse width of long pulsed laser on aluminum alloy

Mingxin Li, Guangyong Jin, Juan Bi, Wei Zhang, Gui-bo Chen

Proceedings Volume 9521, 95211P (2015) https://doi.org/10.1117/12.2182144

KEYWORDS: Aluminum, Pulsed laser operation, Data modeling, Interfaces, Optical simulations, Laser drilling, Numerical simulations, Laser processing, Liquids, Data centers

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Proceedings Article | 4 March 2015 Paper

Numerical simulation of different pulse width of long pulsed laser on aluminum alloy

Guangyong Jin, Mingxin Li, Wei Zhang, Guibo Chen, Juan Bi

Proceedings Volume 9521, 95211R (2015) https://doi.org/10.1117/12.2182358

KEYWORDS: Aluminum, Pulsed laser operation, Data modeling, Interfaces, Optical simulations, Laser drilling, Numerical simulations, Laser processing, Liquids, Data centers

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Proceedings Article | 18 December 2014 Paper

Analysis of thermodynamic effect in Si irradiated by pulsed-laser

Huadong Yu, Ming Guo, Guangyong Jin, Mingxin Li, Yao Ma, Boshi Yuan

Proceedings Volume 9295, 92950S (2014) https://doi.org/10.1117/12.2073029

KEYWORDS: Silicon, Semiconductor lasers, Pulsed laser operation, Laser energy, 3D modeling, Laser irradiation, Temperature metrology, Laser applications, Thermal effects, Thermodynamics

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According to the heat conduction equation, thermoelastic equation and boundary conditions of finite, using the finite element method(FEM), established the three-dimensional finite element calculation model of thermal elastic ,numerical simulation the transient temperature field and stress field distribution of the single crystal silicon materials by the pulsing laser irradiation, and analytic solution the temperature distribution and stress distribution of laser irradiation on the silicon material , and analyzes the different parameters such as laser energy, pulse width, pulse number influence on temperature and stress, and the intrinsic damage mechanism of pulsed laser irradiation on silicon were studied. The results show that the silicon material is mainly in hot melt under the action of ablation damage.According to the irradiation of different energy and different pulse laser ,we can obtain the center temperature distribution, then get the law of the change of temperature with the variation of laser energy and pulse width in silicon material; according to the principal stress and shear stress distribution in 110 direction with different energy and different pulse, we can get the law of the change of stress distribution with the variation of laser energy and pulse width ;according to the principal stress distribution of single pulse and pulse train in 110 direction, we can get the law of the change of stress with pulse numbers in silicon.When power density of laser on optical material surface (or energy density) is the damage threshold, the optical material surface will form a spontaneous, periodic, and permanent surface ripple, it is called periodic surface structure laser induced (LIPSS).It is the condensed optical field of work to generate low dimensional quantum structures by laser irradiation on Si samples. The pioneering work of research and development and application of low dimensional quantum system has important academic value.The result of this paper provides theoretical foundation not only for research of theories of Si and substrate thermal stress damage and its numerical simulation under laser radiation but also for pulse laser technology and widening its application scope.

Proceedings Article | 18 December 2014 Paper

Theoretical simulation of melt ejection during the laser drilling process on aluminum alloy by single pulsed laser

Mingxin Li, Ming Guo, Di Wang, Xiuying Gu, Guangyong Jin

Proceedings Volume 9295, 92950Q (2014) https://doi.org/10.1117/12.2072886

KEYWORDS: Aluminum, Optical simulations, Interfaces, Pulsed laser operation, Laser drilling, Laser processing, Data modeling, Liquids, Thermal modeling, Data centers

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Proceedings Article | 18 December 2014 Paper

Numerical analysis of thermal effect in aluminum alloy by monopulse laser

Xiuying Gu, Guibo Chen, Wei Zhang, Mingxin Li, Guangyong Jin

Proceedings Volume 9295, 92950N (2014) https://doi.org/10.1117/12.2072868

KEYWORDS: Aluminum, Pulsed laser operation, Absorption, Temperature metrology, Thermal effects, Numerical simulations, Laser energy, Numerical analysis, Finite element methods, Laser processing

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A spatial axisymmetric finite element model is established to investigate the distribution characteristics of temperature field that monopulse millisecond laser act on aluminum alloy. The thermal process of laser acting on aluminum alloy (melting, gasification and temperature drop) is simulated. Using the specific quivalent heat capacity method to simulate the solid-liquid, liquid-gas phase transition of aluminum alloy, and considering the differences of thermal physical parameters between different states (solid-liquid, liquid-gas) of aluminum alloy in the process of numerical simulation. The distribution of temperature field of aluminum alloy caused by the change of energy density, pulse width and spot radius of monopulse millisecond laser are investigated systematically by using numerical simulation model. The numerical results show that the temperature of target no longer rises after reaching the target gasification. Given the pulse width and spot radius, the temperature of target rise as the energy density increases, the laser intensity distribution is gaussian, so the temperature distribution of the target surface also shows Gaussian. The energy absorption mechanism of aluminum alloy is surface absorption mechanism, the temperature gradient in axial of the target is much lager than the temperature gradient in radial of the target surface, so the temperature rise in axial only exists a thin layer of target surface. Given the energy density and spot radius, as the pulse width increases, the power density of laser decreases, therefore the temperature of target center point decreases as the pulse width increases, and the temperature difference becomes small. As the pulse width decreases, the heat transfer in axial reduce, the deposition of energy enhances on the surface. Given the energy density and pulse width, the distribution of the temperature is enlarged as the spot radius increases, but the distribution of the temperature in axial is independent of the spot radius.

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