Thermal and stress analyses in an end-pumped Nd:YAG slab laser using finite element method

Bavil, Mina Babaei; Safari, Ebrahim

doi:10.1007/s12206-014-0733-y

Cited by 7 publications

(6 citation statements)

References 13 publications

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“…The differences between the elastic tensors of 0.025Ce:YAG and 1Ce:YAG are visualized in Figures 7 and 8 in terms of the Young's and shear moduli surfaces, respectively. Figure 7A,B show the graphical representation of Young's modulus for 0.025Ce:YAG, with its maximum at 270.20 GPa near the [111] direction (or θ = 2.19 rad, φ = 3.93 rad in the spherical coordinate system), and minimum of 263.95 GPa along the [100], [010], and [001] directions. These results are consistent with the calculated E iso = 267.70 ± 1.75 GPa (Table 3), which falls in between these bounds, suggesting a largely isotropic character of the Young's modulus.…”

Section: Resultsmentioning

confidence: 99%

“…20,21,24 B V , B R , and B H are the Voigt's, Reuss', and Hill's bulk moduli, respectively, which are given by equation 1Shear Voigt (G V ) and shear Reuss (G R ) moduli are defined by equations 2 and 3, respectively; and Hill's averaged shear modulus (G H ) is given by equation 4. Shear moduli [100] (G [100] ) and [110] (G [110] ) represent shear modulus magnitudes in the specified crystallographic directions and are defined by equations 5 and 6, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…for 1Ce:YAG, with a maximum of 247.52 GPa, along the directions of[100], [010], and [001], and a minimum of 230.30 GPa in the [111] direction. The large spread between the bounding values of the Youngs' modulus surface suggest a directional dependence caused by an increase in elastic anisotropy for 1Ce:YAG 63.…”

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confidence: 99%

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Elastic and thermodynamic properties of cerium‐doped yttrium aluminum garnets

et al. 2021

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Cerium-doped yttrium aluminum garnets (Y 3-x Ce x Al 5 O 12 , Ce:YAGs) are promising yellow light-emitting components of solid-state white light-emitting diodes. Although there have been numerous studies examining the effects of Ce concentrations on the luminescent properties of Y 3-x Ce x Al 5 O 12, the impacts of Ce dopant on the elastic and thermodynamic properties are not well understood. In this work, we used resonant ultrasound spectroscopy (RUS) to determine the effects of Ce doping (0.025, 0.1, 1 at. %) on the elastic and thermodynamic properties of Y 3-x Ce x Al 5 O 12 . The elastic moduli calculated via the Voigt-Reuss-Hill (VRH) method demonstrated that low Ce dopant concentrations (≤0.1 at. %) induced negligible effects on the elasticity of the YAG host matrix, while a high Ce concentration (1 at. %) yielded significant softening.RUS spectral analysis and SEM images suggested that the elastic softening originated from microstructural differences induced at higher Ce dopant concentrations.In addition, we demonstrated an increase in elastic anisotropy at higher Ce concentrations, which further elucidated the correlations between structure and elasticity of Y 3x Ce x Al 5 O 12 . Debye temperatures (θ D ), heat capacities (C p ), and thermal conductivities (κ) were calculated for Ce:YAGs through the relations of RUS-derived parameters (sound velocities, elastic moduli) and previously determined thermal expansion coefficients. Ce:YAG was found to have a significant reduction in θ D , C p , and κ at Ce concentrations ≥1 at. %. Lastly, extrapolation of C p and κ to higher temperatures allowed the modeling of thermal stress experienced by Y 3-x Ce x Al 5 O 12 disks up to 1073.15 K.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Elastic and thermodynamic properties of cerium‐doped yttrium aluminum garnets

et al. 2021

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“…Under those conditions, large photon densities could be achieved inside waveguides and, hence, inside photonic circuits. Such large photon densities could be beneficial for some applications (e.g., those involving nonlinear processes [2]) but could also lead to the appearance of adverse effects [3][4][5]. Among all of the potential arising adverse effects, local heating has been well known to be of special relevance [3].…”

Section: Introductionmentioning

confidence: 99%

“…This would lead to deterioration in the confinement ability of the optical WGs. In addition, the appearance of relevant thermal gradients in integrated photonic circuits could give place to the creation of no negligible stress fields that could affect both the performance and lifetime of those integrated circuits [5]. Control over heat generation processes inside WGs therefore becomes essential.…”

Section: Introductionmentioning

confidence: 99%

Two-photon luminescence thermometry: towards 3D high-resolution thermal imaging of waveguides

He¹,

Aldana²,

Pedrola³

et al. 2016

Opt. Express

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Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in: Abstract. We report on the use of erbium-based luminescence thermometry to realize high resolution, three dimensional (3D) thermal imaging of optical waveguides. Proof of concept is demonstrated in a 980-nm laser pumped ultrafast laser inscribed waveguide in an Er:Yb phosphate glass platform. Multi-photon microscopy images revealed the existence of well confined intra-waveguide temperature increments as large as 200 C for moderate 980 nm pump powers of 120 mW. Numerical simulations and experimental data reveal that thermal loading can be substantially reduced if pump events are separated more than the characteristic thermal time that for the waveguides investigated is in the millisecond time scale.

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Analysis of temperature field in friction stir welding based on orthogonal ridgelet finite element method

Zhao

2015

J Therm Anal Calorim

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Thermal and stress analyses in an end-pumped Nd:YAG slab laser using finite element method

Cited by 7 publications

References 13 publications

Elastic and thermodynamic properties of cerium‐doped yttrium aluminum garnets

Elastic and thermodynamic properties of cerium‐doped yttrium aluminum garnets

Two-photon luminescence thermometry: towards 3D high-resolution thermal imaging of waveguides

Analysis of temperature field in friction stir welding based on orthogonal ridgelet finite element method

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