Growth mechanism of YAG single crystal in planar waveguide by solid-state crystal growth method

Zhang, Ge; Jiang, Benxe; Zhang, Pande; Jiang, Yue; Chen, Shuilin; Zhang, Long

doi:10.1016/j.ceramint.2018.07.133

Cited by 10 publications

(4 citation statements)

References 38 publications

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“…Seeding of abnormal grain growth in this manner has been observed frequently on YAG. 21,22,23,24,25,26 Porosity around the original core-cladding interface was trapped intragranularly and could not be removed by hot isostatic pressing (HIP).…”

Section: Undoped Yag Claddingmentioning

confidence: 99%

Claddings for YAG single crystal high power fiber lasers

Hay

Kim²,

Schlup³

et al. 2023

Solid State Lasers XXXII: Technology and Devices

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Doped single-crystal YAG fibers used as single-mode lasers require claddings with precise refractive index and high thermal conductivity. Three cladding materials that use coextrusion of green cladding on fiber cores as an initial processing step are described: 1. Undoped YAG cladding, followed by sintering or hot isostatic pressing. 2. Ca 3 Ga 2 Ge 3 O 12 garnet cladding that melts beneath 1400°C. 3. LiCa 2 Mg 2 As 3x V 3-3x O 12 garnet cladding that melts beneath 1100°C. Microstructures are characterized by TEM. Equipment and procedures are described. Garnet refractive index models are developed and validated to predict cladding refractive index. Advantages and disadvantages of the different claddings are compared.

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Section: Undoped Yag Claddingmentioning

confidence: 99%

Claddings for YAG single crystal high power fiber lasers

Hay

Kim²,

Schlup³

et al. 2023

Solid State Lasers XXXII: Technology and Devices

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show abstract

“…YAG (Yttrium aluminum garnet, Y 3 Al 5 O 12 ) crystal has the advantages of high thermal conductivity, excellent mechanical properties, high melting point, good light transmission performance, and can be doped with high concentrations, etc [1][2][3][4]. It is the most widely used laser crystal material in solid-state lasers.…”

Section: Introductionmentioning

confidence: 99%

Study on the brittle-plastic transition of YAG crystals based on nano-scratch experiments

Ma,

Zhang,

Gao

et al. 2024

J. Phys.: Conf. Ser.

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YAG crystals are typically hard and brittle materials that are prone to be damaged during optical processing. In order to improve processing quality, it is necessary to avoid brittle damage as much as possible so that the material is removed in the plastic domain, so it is particularly important to study the critical conditions for the brittle-plastic transition of YAG crystals. The brittle-plastic transition of the (100) and (111) crystal faces of YAG crystals was investigated by variable load and constant load nano-scratch experiments. By analyzing the scratch morphology and friction-scratch distance curves, the critical load of brittle plastic transition for each crystal surface is obtained. The results show that the critical loads of (100) and (111) crystal faces for brittle-plastic transformation under variable load nano-scratch experiments are 113.575 mN and 84.05 mN, respectively, and the different critical loads of the two crystal faces are due to the discrepancy of surface energy. According to Griffith’s fracture theory, because the surface energy of (100) crystal face is higher, the energy required for brittle fracture of the crystal surface is higher, so the critical load of brittle-plastic transition is larger. Finally, the correctness of the critical load was verified by constant load nano-scratch experiments.

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“…YAG crystal, one of the most often used laser crystal materials in solid state lasers, has a high melting point, great mechanical qualities, outstanding thermal conductivity, and strong light resistance. [1][2][3][4][5][6][7] In order to ensure the performance of the laser, YAG crystal elements require extremely high optical processing DOI: 10.1002/crat.202300091 accuracy. [5] However, YAG crystal is a typical hard and brittle material, which is insoluble in any acid or alkali at room temperature, making it difficult to process.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Nanoindentation Size Effects of YAG Crystals with Different Crystal Faces

Ma,

Zhang,

Zhang

et al. 2023

Cryst. Res. Technol.

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In this study, the anisotropic mechanical properties of YAG crystal (100), (110), and (111) crystal faces are investigated by nanoindentation experiments. The load‐displacement curves, hardness (H) and elastic modulus (E) are obtained for each crystal face at different maximum loads. The loading curves of the three crystal faces showed displacement mutations, which are caused by microcracks during indentation of the indenter. The H and E of three crystal faces dropped as the indentation depth increased, obviously indicating indentation size effect (ISE). The H and E magnitude sequence of the three crystal faces is: (110) > (111) > (100). The surface energy is calculated by the Cambridge Serial Total Energy Package (CASTEP) program to explain the experimental phenomenon that the hardness and elastic modulus of the three crystal faces are different. Using the Nix‐Gao model to fit the Hardness‐indentation depth data, the hardness H0 of the (100), (110), and (111) crystal faces without strain gradient effect are obtained as 12.978, 15.61, and 15.432 GPa, respectively, which can be used as a reference value for the hardness of YAG crystals. The characteristic lengths h* of (100), (110), and (111) crystal faces are 730.545, 362.049, and 375.196 nm, respectively.

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Growth mechanism of YAG single crystal in planar waveguide by solid-state crystal growth method

Cited by 10 publications

References 38 publications

Claddings for YAG single crystal high power fiber lasers

Claddings for YAG single crystal high power fiber lasers

Study on the brittle-plastic transition of YAG crystals based on nano-scratch experiments

Mechanical Properties and Nanoindentation Size Effects of YAG Crystals with Different Crystal Faces

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