High brightness beam shaping and fiber coupling of laser-diode bars

Yu, Jian; Guo, Linui; Wu, H. R.; Zhao, Wei; Tan, Huaqiao; Gao, Songxin; Wu, Deyong; Zhang, Kai

doi:10.1364/ao.54.003513

Cited by 23 publications

(5 citation statements)

References 7 publications

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“…In the past, spot radius, M 2 factor, beam parameter product and other total multiparameters have been used to evaluate the beam quality. The beam parameter product is widely used due to the simultaneous consideration of spot size and angle and is easy to calculate, and is defined as equation (1) [2][3][4]:…”

Section: Beam Shaping Principle and Light Source Designmentioning

confidence: 99%

“…In recent years, with the research and development of beam shaping technology, fiber-coupled semiconductor lasers are often used as light sources in medical, industrial processing, pumping and other fields [1][2][3]. For a typical diode outgoing beam, the beam's fast-axis angle (vertical) is generally 30°∼ 60°, and the slow-axis angle (horizontal) is generally 6°∼ 12°, with the angle in both directions showing a large difference [4]. At the same time in order to achieve high power application requirements, there will be a single tube or bar as a light source when the use of a larger number, greatly increasing the design cost.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous polarization and wavelength merging for efficient fiber coupling system using a designed one-mirror prism

Liu,

Xue,

Yan

et al. 2024

Eng. Res. Express

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The difference in beam quality between the fast-axis and slow-axis directions of semiconductor lasers limits its wide application. Conventional development methods for solving this problem require a large number of optical components. A one-mirror prism shaping scheme based on wavelength combination and polarization combination techniques is proposed to simultaneously halve the optical width in the slow-axis direction and fill in the dark region in the fast-axis direction to improve and equalize the beam quality. Compared with the traditional beam shaping scheme, the design does not use the cutting-translation-rearrangement of prism technology to avoid uneven spot distribution at the same time, the use of the design of a single prism can achieve several functions to improve the efficiency of prism utilization, to avoid the use of prism stacks, the whole system is simple and compact, easy to implement The design couples two laser stacks, both consisting of 10 cm-bars, into the target fiber with a fiber characteristic of 400 μm, 0.22. An output power of 1415.8 W is obtained from the output end of the fiber, and the coupling efficiency is calculated to be 88.5%.

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Section: Beam Shaping Principle and Light Source Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simultaneous polarization and wavelength merging for efficient fiber coupling system using a designed one-mirror prism

Liu,

Xue,

Yan

et al. 2024

Eng. Res. Express

View full text Add to dashboard Cite

show abstract

“…This is mostly owing to the drawbacks of diffractive beam shaping techniques, which are characterized by limited efficiency and a wide spectrum range. At present, the most common optical sources utilized to build laser diode stacks are cm-bar and mini-bar [4]. Although there are more light-emitting units in cm-bar, obtaining a greater power output is more difficult owing to the influence of packing stress, and coupling into the smaller core diameter of the fiber needs a complicated beam shaping mechanism.…”

Section: Introductionmentioning

confidence: 99%

High-power fiber-coupled diode laser module with mini-bar stack

Li,

Zhou,

Zhang

et al. 2023

Advanced Lasers, High-Power Lasers, and Applications XIV

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A 976nm fiber-coupled diode laser module based on stepped prisms and polarization beam combiner is proposed in this paper to solve the mismatch of beam quality in both directions of diode lasers. The beam size was compressed on the fast and slow axis without using a prism stack for beam shaping. Based on that, a laser stack of eight mini bars was coupled into a fiber with a core diameter of 200 μm and a numerical aperture of 0.22. The simulation results show that the output power of the fiber-coupled module is 597 W, the brightness is almost 12.5 MW/(cm2 ·sr), and the optical-to-optical conversion efficiency is 93.28%. The fiber-coupled module proposed in this paper can not only achieve high power outputs but is also widely used in the fields of material processing and industrial.

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“…10 The output power of diode laser can be easily controlled for the cutting process. 11 A compact and high-brightness fibre-coupled system has been designed based on a significant beam shaping method. 12 The diode laser can produce less carbon layer deposition over the cutting region.…”

Section: Introductionmentioning

confidence: 99%

Measurement of carbonization region on leather cutting in CO₂ and diode laser-based laser beam process

Vasanth

Muthuramalingam

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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There is a quite wide range of animal leathers such as cow leather, sheep leather and buffalo leather used for leather garments and leather goods such as bags, wallets and other customized leather articles. The drawbacks of manual cutting can be eliminated by laser-based cutting. However, unwanted carbonization is happened owing to the higher thermal influence. There is no standard procedure or method available to measure the carbonization region on leather cutting. Diode lasers can process leather rapidly and efficiently. In the present work, an attempt was proposed to introduce the image processing-based measurement approach in leather cutting using CO2 laser and diode laser. The cutting experiments were performed on sheep leather with a thickness of 1 mm. It was found that the proposed can effectively measure the heat-affected zone (HAZ) of leather cutting. It has also been found that diode laser could produce lower HAZ than CO2 laser on leather cutting.

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High brightness beam shaping and fiber coupling of laser-diode bars

Cited by 23 publications

References 7 publications

Simultaneous polarization and wavelength merging for efficient fiber coupling system using a designed one-mirror prism

Simultaneous polarization and wavelength merging for efficient fiber coupling system using a designed one-mirror prism

High-power fiber-coupled diode laser module with mini-bar stack

Measurement of carbonization region on leather cutting in CO₂ and diode laser-based laser beam process

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High brightness beam shaping and fiber coupling of laser-diode bars

Cited by 23 publications

References 7 publications

Simultaneous polarization and wavelength merging for efficient fiber coupling system using a designed one-mirror prism

Simultaneous polarization and wavelength merging for efficient fiber coupling system using a designed one-mirror prism

High-power fiber-coupled diode laser module with mini-bar stack

Measurement of carbonization region on leather cutting in CO2 and diode laser-based laser beam process

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Measurement of carbonization region on leather cutting in CO₂ and diode laser-based laser beam process