Combined pulse laser: Reliable tool for high-quality, high-efficiency material processing

Jia, Xianshi; Chen, Yongqian; Liu, Lei; Duan, Jian

doi:10.1016/j.optlastec.2022.108209

Cited by 58 publications

(15 citation statements)

References 101 publications

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“…The local current density at the cathode surface determined by the ion concentration and potential is characterized by the Butler-Volmer eqn (7):…”

Section: Electrodeposition Simulation Modelmentioning

confidence: 99%

“…With the advantages of precision features, ultra-smooth surface finish and mass production capability, the LIGA technique has emerged as the suitable method for large-scale fabrication of micro-devices, such as microfluidic chips, [1][2][3] micro-molds, 4,5 and optical systems. 6,7 As one of the major steps in LIGA, micro-electroforming has the ability to accurately replicate patterned micro molds through the deposition of metal atoms and consequently plays an increasingly important role in the manufacture of mold inserts. 8 However, the electroforming of high-aspect-ratio micro structures is still a challenging task.…”

Section: Introductionmentioning

confidence: 99%

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Electrodeposition model with dynamic ion diffusion coefficients for predicting void defects in electroformed microcolumn arrays

Jiang

Dong

et al. 2023

Phys. Chem. Chem. Phys.

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“…The local current density at the cathode surface determined by the ion concentration and potential is characterized by the Butler-Volmer eqn (7):…”

Section: Electrodeposition Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrodeposition model with dynamic ion diffusion coefficients for predicting void defects in electroformed microcolumn arrays

Jiang

Dong

et al. 2023

Phys. Chem. Chem. Phys.

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“…Various laser machining techniques have already been adapted for sapphire micromachining: to make 2D surface structures, dicing [ 1 ] or direct laser ablation could be used [ 2 , 3 ]. Direct laser processing can be applied to any material, such as metals [ 4 , 5 , 6 , 7 ]. Direct ablation is a relatively efficient and comparably simple process that enables surface functionalization.…”

Section: Introductionmentioning

confidence: 99%

Sapphire Selective Laser Etching Dependence on Radiation Wavelength and Etchant

et al. 2022

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Transparent and high-hardness materials have become the object of wide interest due to their optical and mechanical properties; most notably, concerning technical glasses and crystals. A notable example is sapphire—one of the most rigid materials having impressive mechanical stability, high melting point and a wide transparency window reaching into the UV range, together with impressive laser-induced damage thresholds. Nonetheless, using this material for 3D micro-fabrication is not straightforward due to its brittle nature. On the microscale, selective laser etching (SLE) technology is an appropriate approach for such media. Therefore, we present our research on C-cut crystalline sapphire microprocessing by using femtosecond radiation-induced SLE. Here, we demonstrate a comparison between different wavelength radiation (1030 nm, 515 nm, 343 nm) usage for material modification and various etchants (hydrofluoric acid, sodium hydroxide, potassium hydroxide and sulphuric and phosphoric acid mixture) comparison. Due to the inability to etch crystalline sapphire, regular SLE etchants, such as hydrofluoric acid or potassium hydroxide, have limited adoption in sapphire selective laser etching. Meanwhile, a 78% sulphuric and 22% phosphoric acid mixture at 270 °C temperature is a good alternative for this process. We present the changes in the material after the separate processing steps. After comparing different processing protocols, the perspective is demonstrated for sapphire structure formation.

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“…A thin disk laser can promise its high average power, high peak power, and high beam quality by using the thin disk shaped laser crystal [1], which is widely used in laser drilling [2,3], cutting [4], and welding [5], etc. At present, the main factor limiting the output characteristics of thin disk lasers is the transversely transmitted uorescence photons, especially edge-radiated uorescence photons [6].…”

Section: Introductionmentioning

confidence: 99%

Fluorescence Radiation and Thermal Effect at the Edge of the Disk-Shaped Laser Crystal

Chen

Chen²,

Huang³

et al. 2022

International Journal of Optics

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The fluorescence radiation property at the edge of the thin disk crystal is very important to the design of thin disk lasers. In order to study this effect, in this paper, we established a theoretical model to describe the edge fluorescence radiation process in thin disk lasers. Subsequently, we used a thin disk crystal with indium absorption cladding to quantitatively test the edge fluorescence intensity. The significant difference between measured and simulated data can be described as P (probability value) < 0.1 at the edge when the measured temperature is lower than the melting point of the metal cladding, and P < 0.05 at the pump area. Finally, we analyze the influence of the edge fluorescence radiation on the thin disk laser operation, and the results show that the edge thermal effect will reduce the conversion efficiency of the disk laser by 20%. To the best of our knowledge, this is the first quantitative study on the edge radiation intensity of disk lasers. The research can provide theoretical guidance for the designing and packaging process of crystal elements in thin disk lasers.

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Combined pulse laser: Reliable tool for high-quality, high-efficiency material processing

Cited by 58 publications

References 101 publications

Electrodeposition model with dynamic ion diffusion coefficients for predicting void defects in electroformed microcolumn arrays

Electrodeposition model with dynamic ion diffusion coefficients for predicting void defects in electroformed microcolumn arrays

Sapphire Selective Laser Etching Dependence on Radiation Wavelength and Etchant

Fluorescence Radiation and Thermal Effect at the Edge of the Disk-Shaped Laser Crystal

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