A numerical algorithm for simulation of the Q-switched fiber laser using the travelling wave model

Čiegis, Raimondas; Dement'ev, A.; Laukaitytė, Inga

doi:10.1007/s10986-008-9011-y

Cited by 4 publications

(5 citation statements)

References 19 publications

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“…The situation is different for PLM in which we cannot distinguish different element sequences because of the averaging procedure along the resonator. For numerical solution of transport equations (2.1), (2.2), (2.3), (2.8) and (2.10) the algorithm developed in [11,23] was used. Fig.…”

Section: (±)mentioning

confidence: 99%

“…But for modelling of generation dynamics the so called point laser model (PLM) is still widely used (see [9,14,16,30,35] and references therein). Due to significant mathematical difficulties traveling wave model (TWM) is rarely used for laser generation modelling [4,8,11,20,32,33]. This model is more often used for numerical analysis of fiber [11,33] and semiconductor [12,20,32] lasers.…”

Section: Introductionmentioning

confidence: 99%

“…The Stark splitting of the lasing levels into sublevels, the finite lifetimes of excited levels, excited state absorption in active elements (AE) and saturated absorber (SA) and many other parameters of AE, SA and pump sources were taken into account. The full system of equations with corresponding initial and boundary conditions was numerically solved using the algorithms developed in [11,23]. The obtained results are compared with the known theoretical and experimental data of SSL generation dynamics.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Analysis of Laser Diode Longitudinally Pumped Solid‐state Laser Generation Dynamics Using Traveling Wave Model

Dement'ev¹,

Čiegis

Laukaitytė

et al. 2010

Mathematical Modelling and Analysis

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Abstract. A detailed theoretical model for the description of generation dynamics of diode laser longitudinally pumped solid-state lasers with active and/or passive Q-switching using traveling wave approach is presented. The results of numerical simulations and analysis show that the distribution of generated laser pulse intensity and the other laser parameters along the resonator is very inhomogeneous. Therefore, the widely used point laser model cannot give accurate results when inside the resonator there are active or passive elements which lead to the strong modulation of the generated pulse intensities.

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Section: (±)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Analysis of Laser Diode Longitudinally Pumped Solid‐state Laser Generation Dynamics Using Traveling Wave Model

Dement'ev¹,

Čiegis

Laukaitytė

et al. 2010

Mathematical Modelling and Analysis

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“…Modeling is a useful way to optimize parameters before carrying out experiments. There are a number of theoretical and experimental articles reporting the main features of the simulation of a QSW fiber, in two main ways: a point model [25][26][27][28][29][30][31][32][33][34][35] and a traveling wave approach [36]. The former deals with uniform gain distribution along the gain length, which is inappropriate for high-power fiber lasers.…”

Section: Introductionmentioning

confidence: 99%

Modeling of a Q-switched master oscillator power amplifier fiber laser and gain saturation properties

2020

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Here, a model is developed for a master oscillator power amplifier of a Q-switched double-clad ytterbium--doped fiber laser, based on time -dependent coupled rate equations by virtue of the finite difference method. At first, the master oscillator is modeled with various rise times and its effect on the output peak power and pulse duration is investigated. The output pulse is characterized in terms of input pump power, dopant concentration, fiber length and core diameter. Then, the power amplifier (PA) is modeled to determine the input/output signals via the numerical solution of the coupled rate equations. The best fitting of data is performed over the analytical amplification relation by making use of the least squares method in order to find the gain and saturation parameters. Eventually, the small signal gain and saturation power are obtained under various parameters such as input pump power, dopant concentration, fiber length and core diameter. The dominant effect of filling factors are also discerned versus core diameters to attain the single mode operation. Finally, the power extracted from a single stage PA is envisaged versus various parameters.

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“…In this regard, modeling is a useful method for optimizing parameters before the experiment. In fact, the simulation of a QSW fiber laser performs in two main ways: a point model [11] and a traveling wave scheme [12]. Moreover, the amplifier is characterized by a couple of significant coefficients i.e., smallsignal gain ( 0 () z  ) and saturation power (P sat ) [1], [13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Amplification Parameters in Q-switched Fiber Oscillator-Amplifier Systems

Mousavi

Parvin

Ilchi-Ghazaani

2020

IJOP

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In this paper, an analytical model is presented to compare the monolithic endpumped and distributed side-pumped arrangements in the master oscillator power amplifier (MOPA) of Q-switched (QSW) double-clad (DC) ytterbium (Yb)-doped fiber system. First, the time-dependent rate equations are solved numerically by the finite difference method and the output pulse characteristics are obtained. For more amplifying, the laser pulse is injected into the amplifier and the gain and saturation coefficients are obtained by using the best fitting between the outcoming data from solving rate equations and the transient amplification relation, based on the least squares method (LSM). Finally, the dependence of pump power and dopant concentration on the cavity amplifying parameters are investigated.

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A numerical algorithm for simulation of the Q-switched fiber laser using the travelling wave model

Cited by 4 publications

References 19 publications

Numerical Analysis of Laser Diode Longitudinally Pumped Solid‐state Laser Generation Dynamics Using Traveling Wave Model

Numerical Analysis of Laser Diode Longitudinally Pumped Solid‐state Laser Generation Dynamics Using Traveling Wave Model

Modeling of a Q-switched master oscillator power amplifier fiber laser and gain saturation properties

Investigation of Amplification Parameters in Q-switched Fiber Oscillator-Amplifier Systems

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