Numerical Simulation of Laser Beam Propagation in High Aspect Ratio Channel

2009 ◽  
Author(s):  
Benxin Wu ◽  
Sha Tao ◽  
Shuting Lei
Keyword(s):  
Numerical Simulation ◽  
Aspect Ratio ◽  
Laser Beam ◽  
Process Design ◽  
High Aspect Ratio ◽  
Beam Propagation ◽  
Laser Machining ◽  
Laser Beam Propagation ◽  
Polarization Direction ◽  
The Finite Element Method

Laser beam propagation in high aspect ratio channels has been simulated by solving two-dimensional Maxwell wave equation with the finite element method. It has been found that the optical polarization direction has a very important effect on laser beam propagation in the channel, and under certain polarization direction the laser beam profile may keep changing in a very complicated way as the beam propagates through the channel. The above important effects, revealed by the numerical simulation in this paper, need to be considered to realize an accurate modeling or a good process design for laser machining of high aspect ratio microstructures.

Laser Beam Propagation Through Three-Dimensional High-Aspect-Ratio Microholes

2010 ◽  
Author(s):  
Sha Tao ◽  
Benxin Wu ◽  
Shuting Lei
Keyword(s):  
Aspect Ratio ◽  
Laser Beam ◽  
High Aspect Ratio ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Three Dimensional ◽  
Beam Propagation ◽  
Laser Beam Propagation ◽  
Mechanical Machining ◽  
Hole Structure

The drilling of high-aspect-ratio microholes has very important applications in automotive, aerospace, electronics and other areas. However, this is difficult to realize with conventional mechanical machining or electrical discharge machining approaches. Laser ablation can potentially provide a good solution to this, but it also involves many technical difficulties. One of these is that the hole structure may act like a wave guide and affect the laser beam propagation. However, previous investigations on this important issue are very limited. In this paper, laser beam propagation through high-aspect-ratio microholes has been studied by solving the three-dimensional transient Maxwell’s wave equation, and the important discoveries from the calculations are discussed.

scholarly journals MATHEMATICAL ALGORITHMS OF SOFTWARE FOR NUMERICAL SIMULATION OF ABERRATED LASER BEAM PROPAGATION

1996 ◽  
Vol 1 (1) ◽  
pp. 58-62
Author(s):  
R. Čiegis ◽  
G. Kairytė ◽  
A. Dement'ev
Keyword(s):  
Numerical Simulation ◽  
Laser Beam ◽  
Mathematical Modelling ◽  
Beam Propagation ◽  
Laser Beam Propagation ◽  
Modelling Analysis ◽  
Mathematical Algorithms

„Mathematical algorithms of software for numerical simulation of aberrated laser beam propagation" Mathematical Modelling Analysis, 1(1), p. 58-62

Numerical Simulation of High-Aspect-Ratio Micro-Hole Electroforming with External Magnetic Field

2010 ◽  
Vol 42 ◽  
pp. 13-16
Author(s):  
Wei Li ◽  
Ping Mei Ming ◽  
Wu Ji Jiang ◽  
Yin Ding Lv
Keyword(s):  
Magnetic Field ◽  
Numerical Simulation ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Flow State ◽  
Cathode Electrode ◽  
Micro Hole ◽  
Fluent Software ◽  
The Magnetic Field ◽  
Enhance Mass

In this paper, the influences of applied magnetic field on flow state during electroforming of the high-aspect-ratio (HAR) blind micro-hole were numerically analyzed using the Fluent software. The results showed that, when microelectroforming of nickel without external agitation, three vortexes could form due to the magnetohydrodynamic (MHD) effect within the HAR micro-hole with magnetic field in parallel to cathode-electrode surface, and the flow rate in the micro-hole increased with the increase of the magnetic field and current density. The MHD effect helped to enhance mass transfer during the microelectroforming of HAR microstructures.

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