Light and thermal fields in multilayer skin tissue exposed to laser irradiation

2006 ◽  
Vol 100 (1) ◽  
pp. 139-147 ◽  
Author(s):  
V. V. Barun ◽  
A. P. Ivanov
Keyword(s):  
Laser Irradiation ◽  
Skin Tissue ◽  
Thermal Fields

Quantitative measurement of skin tissue response during laser irradiation in photorejuvenation

2009 ◽  
Vol 7 (6) ◽  
pp. 512-514 ◽  
Author(s):  
黄义梅 Wei Gong ◽  
龚玮 Yimei Huang ◽  
谢树森 Shusen Xie
Keyword(s):  
Laser Irradiation ◽  
Quantitative Measurement ◽  
Tissue Response ◽  
Skin Tissue

Optical and thermal fields induced in the bone marrow by external laser irradiation

2021 ◽  
Author(s):  
Vladimir Yusupov ◽  
Natalia Vorobyeva ◽  
Ruben Chailakhyan ◽  
Alexander Sviridov
Keyword(s):  
Bone Marrow ◽  
Laser Irradiation ◽  
Thermal Fields

Thermal Fields Simulation of the Refining Process for Si Wafer by Continuous-Wave Laser Irradiation

2015 ◽  
Vol 833 ◽  
pp. 117-121 ◽  
Author(s):  
Bao Dian Fan ◽  
Rong Chen ◽  
Ai Suo Pang ◽  
Chao Chen
Keyword(s):  
Laser Irradiation ◽  
Continuous Wave ◽  
Secondary Ion Mass Spectrometry ◽  
Measurement Range ◽  
Maximum Temperature ◽  
Recrystallization Process ◽  
Metal Impurity ◽  
Thermal Fields ◽  
Cw Laser ◽  
Si Wafer

The direct removal of metal impurity from Si wafer by continuous-wave (CW) laser irradiation has been studied. The wafer was irradiated by linear (Nd:YAG) CW laser with a wavelength of 1064nm. The irradiated region of the wafer experienced melting and subsequent recrystallization process during the laser heating and cooling processes. This leads to the redistribution of the metal impurity along the depth direction. The depth profile of metal atoms in Si was measured by secondary ion mass spectrometry (SIMS). The concentration of the metal ions in the CW laser irradiated sample was dramatically decreased at the measurement range of SIMS. Thermal fields of Si wafer irradiated by CW-laser were numerically simulated to explain the SIMS results. A finite element method with a two-dimensional model was selected in the simulation process. The depth of the maximum temperature for the laser irradiated wafer in the irradiation process was related to many parameters, such as, the energy density of the laser and the velocity of the sample moving. The simulation results agree well with our experiment results.

scholarly journals The Effect of Fractional Time Derivative of Bioheat Model in Skin Tissue Induced to Laser Irradiation

Symmetry ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 602
Author(s):  
Aatef Hobiny ◽  
Faris Alzahrani ◽  
Ibrahim Abbas ◽  
Marin Marin
Keyword(s):  
Laser Irradiation ◽  
Fractional Order ◽  
Time Derivative ◽  
Thermal Relaxation ◽  
Skin Tissue ◽  
Laplace Domain ◽  
Denatured Protein ◽  
Design Variables ◽  
New Interpretation ◽  
Fractional Time Derivative

This work uses the “fractional order bio-heat model” (Fob) model of heat conduction to offer a new interpretation to study the thermal damages in a skin tissue caused by laser irradiation. The influences of fractional order and the thermal relaxation time parameters on the temperature of skin tissue and the resulting thermal damage are studied. In the Laplace domain, the analytical solutions of temperature are obtained. Using the equation of Arrhenius, the resulting thermal injury to the tissues is assessed by the denatured protein ranges. The numerical results of the thermal damages and temperature are presented graphically. A parametric analysis is dedicated to the identifications of suitable procedures for the selection of significant design variables to achieve an effective thermal in the therapy of hyperthermia.

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