The effect of residual porosity on the optical properties of Y3Al5O12:Nd3+ laser ceramics

Vorona, I.O.; Yavetskiy, R.P.; Shpilinskaya, O. L.; Kosyanov, D.Yu.; Doroshenko, A.G.; Parkhomenko, S.V.; Lopin, A. V.; Tolmachev, A. V.

doi:10.1134/s1063785015050302

Cited by 14 publications

(6 citation statements)

References 14 publications

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“…3a. The existence of small (not exceeding 500 nm) pores in samples 1 and 2 introduces a slight error in the aver- age diameter of pores, because of which the calculated residual porosity is underestimated [13]. Nevertheless, the volume fraction of pores in sample 3 synthesised according to [17] (2.3 ´ 10 -3 vol %) is considerably smaller than in samples 1 and 2 obtained by the method of [16] (7.9 ´ 10 -3 and 11 ´ 10 -3 vol %, respectively).…”

Section: Resultsmentioning

confidence: 99%

“…In this connection, it seems interesting to study the influence of the microstructure of YAG ceramics on its optical and laser properties. Previously, it was found that the residual porosity affects the optical properties [13] and lasing efficiency [14] of Nd : YAG ceramics, while the relation between the optical and laser properties of this ceramics was studied in [15]. In the present work, we study the influence of the structural and optical inhomogeneity of Nd : YAG ceramics on the laser parameters.…”

Section: Introductionmentioning

confidence: 88%

“…To determine the size of pores and the residual porosity, we used the optical microscopy method described in [13]. The slope efficiency of the samples was measured under pumping by a fibre-coupled laser diode ( l p = 808 nm).…”

Section: Effect Of Microstructural Features On the Laser Efficiency Omentioning

confidence: 99%

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Effect of microstructural features on the laser efficiency of Nd³⁺:Y₃Al₅O₁₂ceramics

et al. 2015

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The optical properties and microstructure of transparent Nd 3+ : Y 3 Al 5 O 12 ceramics synthesised by different reactive sintering routes are studied. It is found that the residual porosity of optical ceramics is directly related to the homogeneity of the microstructure of initial compacts, which can be estimated by the existence of particle agglomerates larger than 1 mm in initial nanopowders. A qualitative correlation is established between the residual porosity, the optical losses and the lasing slope efficiency of Nd 3+ : Y 3 Al 5 O 12 ceramics. The maximum laser efficiency (h = 49 %) was observed in the samples with the lowest porosity (2.3 ´ 10 -3 vol %).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 88%

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Effect of microstructural features on the laser efficiency of Nd³⁺:Y₃Al₅O₁₂ceramics

et al. 2015

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“…An increase in the neodymium concentration up to 4 at.% does not affect the pore concentration and optical quality of the single-layer samples (Fig. 3a), while the typical porosity of Nd 3+ :YAG ceramics obtained by the reactive sintering method is ∼ 10 −3 -10 −4 vol.% [10]. Thus, defect formation in the ceramics with "sandwich" structure was caused by pore formation on the interfaces of doped and undoped layers during sintering.…”

Section: Characterizationmentioning

confidence: 91%

Reactive sintering of highly-doped YAG/Nd3+:YAG/YAG composite ceramics

Vorona

Yavetskiy

Doroshenko

et al. 2017

PAC

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Multilayer YAG/Nd 3+ :YAG/YAG composite laser ceramics were obtained by the reactive sintering in vacuum. The effect of the neodymium ion concentration (1-4 at.%) on the formation of defects and optical quality of composite ceramics was studied. It was found that neodymium ions modify densification kinetics during solid-state reactive sintering of the highly-doped Nd 3+ :YAG ceramics by decreasing shrinkage rate in the temperature range 1320-1350°C. Differences in phase transformation kinetics during reactive sintering lead to generation of pores at the interface of adjacent layers which decrease the optical homogeneity of fabricated YAG/Nd 3+ :YAG/YAG composite ceramics. The influence of layered structure on the laser performance of optical ceramics was investigated. It was shown that the ceramics with multilayer composite architecture have slope efficiency almost twice as the single-layer ceramics with the same composition (22% and 12.5%, respectively).

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“…In their experiments, the residual porosity of Nd:YAG ceramics decreased with an increase in the sintering time and the lowest porosity was achieved when sintered at 1750°C. 18 In our previous work, the Nd:YAG ceramics with different transparencies were fabricated through vacuum sintering by Zhang et al The results suggested that the porosity depended upon the heating rate during sintering process. 19 Apart from experimental exploration, theoretical simulation is another important approach to investigate the pores' effect on ceramic transparency.…”

Section: Introductionmentioning

confidence: 99%

Light scattering by pores in YAG transparent ceramics simulated by DDA model

Yang

Duan

et al. 2020

J. Am. Ceram. Soc.

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Discrete dipole approximation (DDA) simulation was applied to study the effect of pores on light scattering in ceramics. The results of the DDA method were compared with that of Mie theory. The DDA method was approved to be reliable for calculating the scattering coefficients of YAG ceramics. The dependences of scattering coefficients on pore size and porosity, and the equal K sca (scattering coefficients) curves were all recalculated via DDA method. The results revealed that scattering coefficients increase with the increase of porosity and that small pores (diameters are about three-quarters of incident wavelength) produce much more light scattering than larger pores (diameters are several times larger than incident wavelength) at the same porosity. Furthermore, the equal K sca (scattering coefficients) curves showed that relatively high porosity will not sacrifice the critical pore size any more when pore sizes are several times larger than incident wavelength. This discovery perfects the scattering critical curves and has guiding significance for experiment. K E Y W O R D S DDA method, scattering, transparent ceramics, yttrium aluminum garnet How to cite this article: Yang Y, Ma N, Duan J, et al. Light scattering by pores in YAG transparent ceramics simulated by DDA model.

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The effect of residual porosity on the optical properties of Y3Al5O12:Nd3+ laser ceramics

Cited by 14 publications

References 14 publications

Effect of microstructural features on the laser efficiency of Nd³⁺:Y₃Al₅O₁₂ceramics

Effect of microstructural features on the laser efficiency of Nd³⁺:Y₃Al₅O₁₂ceramics

Reactive sintering of highly-doped YAG/Nd3+:YAG/YAG composite ceramics

Light scattering by pores in YAG transparent ceramics simulated by DDA model

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The effect of residual porosity on the optical properties of Y3Al5O12:Nd3+ laser ceramics

Cited by 14 publications

References 14 publications

Effect of microstructural features on the laser efficiency of Nd3+:Y3Al5O12ceramics

Effect of microstructural features on the laser efficiency of Nd3+:Y3Al5O12ceramics

Reactive sintering of highly-doped YAG/Nd3+:YAG/YAG composite ceramics

Light scattering by pores in YAG transparent ceramics simulated by DDA model

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Product

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Effect of microstructural features on the laser efficiency of Nd³⁺:Y₃Al₅O₁₂ceramics

Effect of microstructural features on the laser efficiency of Nd³⁺:Y₃Al₅O₁₂ceramics