TEA CO2 Laser Simulator: A software tool to predict the output pulse characteristics of TEA CO2 laser

Ghani, B. Abdul

doi:10.1016/j.cpc.2005.05.007

Cited by 9 publications

(6 citation statements)

References 4 publications

(6 reference statements)

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“…where S i is photo-ionization rate near the electrodes due to the main discharge region and pre-ionization part [17]. The values of Townsend ionization coefficients, , i a recombination rate coefficient, , b and negative-ion detachment, , d are obtained from [3]. N is the molecule concentration and…”

Section: Calculation Of Electron Densitymentioning

confidence: 99%

“…High energy transversely excited atmospheric pressure (TEA) CO 2 lasers play an important role in many scientific, industrial and military applications [1,2]. Many programs have so far been written for simulation of the dynamic emission in such lasers in order to understand their physics and prediction of the output characteristics [3][4][5][6][7][8][9][10][11]. Different theoretical models such as four-, five-, and six-temperature models (6TM) are used to describe the kinetic processes of these types of lasers.…”

Section: Introductionmentioning

confidence: 99%

“…Some of the presented models use an empirical equation for electron density distribution [3,4] while others make use of pulse forming networks equations [11]. In these models, many electron generation processes such as pre-ionization and some interactions in plasma are ignored.…”

Section: Introductionmentioning

confidence: 99%

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Simulation and initial experiments of a high power pulsed TEA CO₂laser

et al. 2015

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In this paper, the output characteristics of a UV pin array pre-ionized TEA CO 2 laser have been simulated and compared with the associated experimental data. In our simulation, a new theoretical model has been improved for transient behavior analysis of the discharge current pulse. The laser discharge tube was modeled by a nonlinear RLC electric circuit as a real model for electron density calculation. This model was coupled with a six-temperature model (6TM) in order to simulation dynamic emission processes of the TEA CO 2 laser. The equations were solved numerically by the fourth order Runge-Kutta numerical method and some important variables such as current and voltage of the main discharge, resistance of the plasma column and electron density in the main discharge region, were calculated as functions of time. The effects of non-dissociation factor, rotational quantum number and output coupler reflectivity were also studied theoretically. The experimental and simulation results are in good agreement.

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Section: Calculation Of Electron Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulation and initial experiments of a high power pulsed TEA CO₂laser

et al. 2015

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“…Each of these items plays a key role in achieving stable and longterm operation of the laser especially at high repetition rates and sealed-off regime [27][28][29]. Therefore, much experimental [25,[30][31][32] and theoretical [31,[33][34][35][36][37] works have been done * Author to whom any correspondence should be addressed. so far to characterize the spatial-temporal properties of the output pulses of the pulsed CO 2 lasers according to their structural and operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Some experimental studies on the UV spark pin-array pre-ionization in TEA CO₂ laser

Torabi¹,

Nejhad²,

Kazemi³

et al. 2022

Laser Phys.

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The output characteristics of a UV pin array pre-ionized transversely excited atmospheric CO2 laser have been experimentally studied in detail. The effects of the applied voltage and capacitance of the main capacitors on the laser performance was investigated. By increasing the voltage at a constant capacitance, not only the laser output energy increases, but also the pulse build-up time, width and tail length decrease. Also, the stability conditions of the discharge were investigated and the cross section of the laser output beam at different input energies was compared.

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“…They were also the first to add the vibrational states of CO molecules to those of CO 2 and N 2 for prediction of the CO 2 lasers output characteristics by 6-temperature model (6TM). This model provide better simulation results (in respect to 4 and 5-temperature previous models) by taking into account more vibrational energy levels involved in population distribution [3][4][5][6][7]. Nowadays, this model is widely used to theoretical analysis of CW [3,4] and TEA CO 2 [5][6][7] lasers operation, mathematical modeling of the tunable [8] and hybrid [9][10][11] CO 2 lasers, dynamic analysis of Q-switched TEA CO 2 lasers [12] and recently, CW CO 2 laser pulse amplifier [13].…”

Section: Introductionmentioning

confidence: 99%

Generalization of the 6-Temperature model for simulation of super-atmospheric pulsed CO₂ lasers output

Torabi¹,

Silakhori²

2021

Phys. Scr.

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The output characteristics of a home-made 1–3 atm pulsed CO2 laser are simulated by using Six-Temperature Vibrational-Rotational Dynamic Model (6TVRM). The discharge volume was modeled by a non-linear distributed lumped electric circuit and the electron density was calculated by Transmission Line Method. Different characteristics of the laser pulses such as energy, build-up time and duration of the spike and tail parts were measured at various operational conditions of the pressure, discharge voltage and main capacitance. Then, the obtained data were compared with the simulation results calculated for the corresponding conditions. The good agreement observed between the experimental and simulation results has revealed the promising capability of 6TVRM to be generalized for describing the output behavior of the supper-atmospheric pulsed CO2 lasers.

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TEA CO2 Laser Simulator: A software tool to predict the output pulse characteristics of TEA CO2 laser

Cited by 9 publications

References 4 publications

Simulation and initial experiments of a high power pulsed TEA CO₂laser

Simulation and initial experiments of a high power pulsed TEA CO₂laser

Some experimental studies on the UV spark pin-array pre-ionization in TEA CO₂ laser

Generalization of the 6-Temperature model for simulation of super-atmospheric pulsed CO₂ lasers output

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TEA CO2 Laser Simulator: A software tool to predict the output pulse characteristics of TEA CO2 laser

Cited by 9 publications

References 4 publications

Simulation and initial experiments of a high power pulsed TEA CO2laser

Simulation and initial experiments of a high power pulsed TEA CO2laser

Some experimental studies on the UV spark pin-array pre-ionization in TEA CO2 laser

Generalization of the 6-Temperature model for simulation of super-atmospheric pulsed CO2 lasers output

Contact Info

Product

Resources

About

Simulation and initial experiments of a high power pulsed TEA CO₂laser

Simulation and initial experiments of a high power pulsed TEA CO₂laser

Some experimental studies on the UV spark pin-array pre-ionization in TEA CO₂ laser

Generalization of the 6-Temperature model for simulation of super-atmospheric pulsed CO₂ lasers output