Numerical modeling of a fast-axial-flow CW–CO2 laser

Al‐Hawat, Sh.; Al-Mutaib, Kheir

doi:10.1016/j.optlastec.2005.10.001

Cited by 14 publications

(13 citation statements)

References 9 publications

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“…Decrease of the output power versus loss coefficient is due to decreasing of the gain coefficient or population inversion. This is also consistent with Al-Hawat and Al-Mutaib (2007). Figure 8 shows the dependence of the laser output power on the gas velocity.…”

Section: Simulation Results and Comparison With Experimentalsupporting

confidence: 87%

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Kinetic modeling of a slow flow CW CO2 laser

2011

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A kinetic model for analysis of the slow-flow CW-discharge CO 2 laser with diffusion cooling has been developed in which the gas temperature is obtained from energy balance equations. The method is based on the numerical solution of a set of nonlinear differential equations for vibrational kinetics. The numerical predictions from the model are compared with some experimental results and a good agreement is obtained.

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Section: Simulation Results and Comparison With Experimentalsupporting

confidence: 87%

“…The number density of electrons is calculated from the discharge current given by the following equation Al-Hawat and Al-Mutaib 2007).…”

Section: Kinetic Modelmentioning

confidence: 99%

Kinetic modeling of a slow flow CW CO2 laser

2011

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“…The main high-power CO 2 lasers used for laser processing contain multichannel slab discharge CO 2 lasers [1][2][3][4][5], waveguide CO 2 lasers [6][7][8], transverse flow CW CO 2 lasers [9][10][11], fast axial flow CW CO 2 lasers [12][13][14], and axisymmetric-fold combination cavity (ASFC) CO 2 lasers [15][16][17][18][19][20]. The above CO 2 lasers have many advantages; for example, the waveguide and slab CO 2 lasers with output power of 500-1000 W have a small volume and can be fixed directly with machine tools for laser processing.…”

Section: Introductionmentioning

confidence: 99%

Misalignment analysis of combination-cylinder discharge CO_2 laser

2014

Appl. Opt.

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The axes of a laser resonator will deviate away from the initial places when the combination-cylinder discharge CO₂ laser (CCDCL) is misaligned. The new cavity axes are established through using the misaligned augmented matrixes. The influences of the misalignments on the properties of the laser beams are studied in detail, such as the line deviations and angle deviations of oscillation beams in CCDCL, the near- and far-field distribution of output beams, the diffraction loss and output power, and the beam quality factor. It is shown that the influences of the misalignments on the above properties of the laser beams are obvious when the misaligned angle of the laser resonator exceeds 30 s. The studied results can afford references for the design of a CCDCL.

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“…[7][8][9][10][11][12][13][14][15] The earliest research on computer modeling of a gas laser is Smith and Thompson. 7 Then Beverly proposed the six-temperature Boltzmann-equilibrium kinetics model.…”

Section: Introductionmentioning

confidence: 99%

“…12,13 Al-Hawat and Al-Mutaib proposed a four-temperature model using the Runge-Kutta method. 14 And finally, Jelvani and Saeedi used numerical methods in the framework of a 1-D approximation of the set of governing equations and studied the effect of the laser tube diameter on the parameters of the active medium of the laser. 15 The development and application of the computational fluid dynamics (CFD) software make the analysis of the 3-D gas flow patterns possible and the discharge tube design process more efficient.…”

Section: Introductionmentioning

confidence: 99%

Kinetic modeling and optimum design of the discharge tube for the CO<sub>2</sub> laser with computational fluid dynamics method

Huang

Wang

2010

Opt. Eng

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The performance of a high-power fast-axial-flow CO 2 laser is directly determined by the characteristics of the turbulent flow of the active medium in the discharge region. To research the influence of the discharge tube structure on the internal gas flow field and determine the optimum design of the discharge tube, we use the computational fluid dynamics method and a set of governing equations to predict and compare the internal gas flow field of various sizes of discharge tubes. The influence of the tube diameter and gas inflow opening size on the gas flow velocity and turbulence intensity is discussed. There is good agreement between the theoretical prediction and the experimental results. The results obtained provide a basis for the optimum design of a high-power industrial fast-axial-flow CO 2 laser. C 2010 Society of Photo-Optical Instrumentation Engineers.

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Numerical modeling of a fast-axial-flow CW–CO2 laser

Cited by 14 publications

References 9 publications

Kinetic modeling of a slow flow CW CO2 laser

Kinetic modeling of a slow flow CW CO2 laser

Misalignment analysis of combination-cylinder discharge CO_2 laser

Kinetic modeling and optimum design of the discharge tube for the CO<sub>2</sub> laser with computational fluid dynamics method

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