Laser Heating of Substrate by Multi-Beam Irradiation

MRS Proceedings ◽

10.1557/proc-279-705 ◽

1992 ◽

Vol 279 ◽

Author(s):

Y. F. Lu

Keyword(s):

Heat Flow ◽

Laser Beam ◽

Temperature Profile ◽

Temperature Rise ◽

Laser Heating ◽

Temperature Profiles ◽

Beam Irradiation ◽

Gaussian Laser Beam ◽

Beam Laser ◽

Flow Intensity

ABSTRACTA general model is derived for computing the temperature profile induced by multi-beam laser irradiation in a semi-infinite substrate. The model is then applied to calculate 2-beam irradiation induced temperature rise in substrate. From this model, it is possibLe to calculate the temperature profile induced by multi-beam irradiation in substrate. The calculated results show that the double-Gaussian beam has advantages of narrow temperature profile and low heat flow intensity. Flatly-topped temperature profiles can be obtained by converting the Gaussian laser beam.

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EFFECTS OF COMBINED RADIATIVE AND CONVECTIVE HEAT TRANSFER ON TEMPERATURE BENEATH MODULATED SOURCE

International Journal of Modern Physics B ◽

10.1142/s0217979207036679 ◽

2007 ◽

Vol 21 (11) ◽

pp. 1903-1913 ◽

Cited By ~ 3

Author(s):

KAREM BOUBAKER ◽

M. BOUHAFS

Keyword(s):

Heat Transfer ◽

Analytical Solution ◽

Laser Beam ◽

Heat Equation ◽

Convective Heat Transfer ◽

Temperature Profile ◽

Convective Heat ◽

Calculation Method ◽

Gaussian Laser Beam ◽

Non Gaussian

An analytical solution is presented to the heat equation in the vicinity of a surface fluid, heated by a modulated Gaussian Laser beam and taking into account three heat transfer modes: conduction, radiation and convection. A new calculation method is performed for profiling temperature inside a surface fluid. Comparison with several experimental profiles explains some unexpected temperature profile results as non-Gaussian behaviour.

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Numerical Solution for a Transient Temperature Distribution on a Finite Domain Due to a Dithering or Rotating Laser Beam

International Journal of Operations Research and Information Systems ◽

10.4018/ijoris.2013100102 ◽

2013 ◽

Vol 4 (4) ◽

pp. 22-38

Author(s):

Tsuwei Tan ◽

Hong Zhou

Keyword(s):

Temperature Distribution ◽

Laser Beam ◽

Temperature Rise ◽

Maximum Temperature ◽

Finite Domain ◽

Transient Temperature ◽

Gaussian Laser Beam ◽

Maximum Temperature Rise ◽

Transient Temperature Distribution ◽

Spatial Dimensions

The temperature distribution due to a rotating or dithering Gaussian laser beam on a finite body is obtained numerically. The authors apply various techniques to solve the nonhomogeneous heat equation in different spatial dimensions. The authors’ approach includes the Crank-Nicolson method, the Fast Fourier Transform (FFT) method and the commercial software COMSOL. It is found that the maximum temperature rise decreases as the frequency of the rotating or dithering laser beam increases and the temperature rise induced by a rotating beam is smaller than the one induced by a dithering beam. The authors’ numerical results also provide the asymptotic behavior of the maximum temperature rise as a function of the frequency of a rotating or dithering laser beam.

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