Study on Fiber Laser Cutting of Aluminum Alloy Sheet

Cong, 陈聪 Chen; Ming, 高明 Gao; Yunze, 顾云泽 Gu; Lei, 王磊 Wang; Huanqing, 杨欢庆 Yang; Xiaoyan, 曾晓雁 Zeng

doi:10.3788/cjl201441.0603004

Cited by 4 publications

(1 citation statement)

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“…In recent decades fiber lasers and amplifiers have undergone great development due to advances in high-brightness diode pump sources and fiber fabrication technologies [1][2][3][4]. Highpower fiber lasers have great potential for development in laser welding and cutting due to their characteristics of high energy density and short wavelength [5][6][7]. However, all-fiber lasers attract more attention for industrial applications due to their advantages of ease of use and manufacture [2,[8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Optimization of seed power for suppression of stimulated Raman scatting in all-fiber amplifiers

et al. 2019

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In this paper, the influence of seed power on a few-mode all-fiber amplifier is analyzed theoretically and experimentally. Numerical simulation results gave an optimized seed power for this amplifier considering three factors which are usually important in high-power fiber lasers: optic-to-optic efficiency, Raman ratio and output power. A 3.02 kW light with a good beam quality (M2 ~ 1.7) has been obtained with an injection seed power of 300 W, and the intensity of Raman light was 20 dB below the signal light in the spectrum. In experiments with other injected seed powers, the output characteristics were degraded to different degrees, in agreement with the theoretical results.

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Section: Introductionmentioning

confidence: 99%

Optimization of seed power for suppression of stimulated Raman scatting in all-fiber amplifiers

et al. 2019

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Effect of multi-parameter optimization of water-laser coupling device and nozzle geometry on the stability of water-guided laser beam

Wu,

Nie,

et al. 2024

Physics of Fluids

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The stability of the water jet flow used in water-guided laser processing plays a crucial role in determining the quality of the processing process. The present study aims to investigate the effect of water-laser coupling device and nozzle geometry on the stable length of a water-guided laser beam. A numerical model is developed to analyze the internal flow field within the coupling device. Computational fluid dynamics (CFD) simulations are employed to examine how variations in cone nozzle's length-to-diameter ratio, divergence angle, nozzle aperture, and inlet pressure that affect the flow characteristics of water jet. Subsequently, the Latin Hypercube experimental design method is employed to establish parameter samples and construct a Kriging approximation model for the stable length of water-guided laser beam. The Multiple Island Genetic Algorithm (MIGA) is utilized for global optimization of the approximation model, while CFD methods are employed to analyze and validate the optimization results. Finally, experimental verification was conducted to determine the stable length of water-guided laser beam generated by the optimized cone nozzle structure. The research findings demonstrate that the optimized nozzle structure can compensate for approximately 21 mm in the stable distance of water-guided laser beam under the pressure of 5.0 MPa. This study provides valuable guidance for enhancing the performance and engineering applications of laser micro-jet processing technology.

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Research on Adjustable Ring-Mode Fiber Signal Combiner

Min

Wang

et al. 2023

Photonics

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Nowadays, fiber laser has been widely used in industrial processing, especially in welding, cutting and other fields, and the appearance of adjustable ring-mode fiber laser improves effectively the quality of processing. In this paper, a (6 + 1) × 1 adjustable ring-mode fiber signal combiner is developed based on the technology of fiber cladding corrosion. The test results show that under the same injection condition, the beam quality transmitted through the central port of the combiner is degraded by only 8.3% compared with that transmitted through a single 50/250 μm fiber. It is proven to be feasible to maintain the beam quality of the (6 + 1) × 1 combiner by fiber corrosion technology. In order to improve the power of the central port of the (6 + 1) × 1 adjustable ring-mode combiner, a 3 × 1 fiber signal combiner and the central port of (6 + 1) × 1 combiner are cascaded. The output beam quality is M2 = 4.45 and the overall transmission efficiency is greater than 95%. This combiner can choose the mode of the output beam according to the actual application requirements, so as to achieve a better application effect.

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Study on Fiber Laser Cutting of Aluminum Alloy Sheet

Cited by 4 publications

References 0 publications

Optimization of seed power for suppression of stimulated Raman scatting in all-fiber amplifiers

Optimization of seed power for suppression of stimulated Raman scatting in all-fiber amplifiers

Effect of multi-parameter optimization of water-laser coupling device and nozzle geometry on the stability of water-guided laser beam

Research on Adjustable Ring-Mode Fiber Signal Combiner

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