Beam-shaping design for multi-wavelength diode laser stack system coupled into optical fiber for biomedical applications

Leggio, Luca; Gallego, Daniel; Gawali, Sandeep Babu; Wiśniowski, Bartosz; Varona, Omar De

doi:10.1016/j.rio.2021.100150

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…It is shown that a new shaping method is proposed, which unlike the conventional polarization combiner utilized in the slow-axis direction is used in the fast-axis direction and fills the dark regions with each other by up to six sets of stacks of different wavelengths ultimately combining the output into an optical fiber, which has NA (numerical aperture) = 0.5 and D fiber (core diameter) = 100 μm [11]. It is shown that the proposed shaping system is composed of multiple polygonal prisms, and the proposed polygonal prism has a minimum edge length of nearly 2 mm, which ultimately focuses the beam into a 200 μm, 0.22 fiber and obtains an output power of 272 W [12].…”

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

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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: 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

High power and small spot fiber coupling system for pump sources based on symmetric stepped prisms

Liu,

Xue,

Yan

et al. 2024

J Opt

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Compact beam shaping design based on polarization plane multiplexing of semiconductor lasers

et al. 2022

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Fiber coupling is difficult due to the uneven beam parameter product between the vertical and horizontal axes of semiconductor lasers. A beam shaping technique based on the combination of the internal total reflection and polarization surface of a stepped prism is proposed to achieve filling the dark area of the beam and polarization merging, as well as enabling the polarization plane to be multiplexed and the utilization rate of the polarization plane to be increased. The proposed technology can couple three groups of stacked array semiconductor lasers into a single fiber, in which the center diameter is 200 µm, and the numerical aperture is 0.22. The simulation results indicated that the output power of 1099 W and optical-optical conversion productivity of 85.8% were achieved.

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Beam-shaping design for multi-wavelength diode laser stack system coupled into optical fiber for biomedical applications

Cited by 4 publications

References 13 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 and small spot fiber coupling system for pump sources based on symmetric stepped prisms

Compact beam shaping design based on polarization plane multiplexing of semiconductor lasers

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