Beam delivery by large-core fibers: effect of launching conditions on near-field output profile

Su, Daoning; Boechat, Alvaro A. P.; Jones, Julian D. C.

doi:10.1364/ao.31.005816

Cited by 36 publications

(12 citation statements)

References 5 publications

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“…Fiber lengths used in many applications fall into the intermediate category. The length scale of "intermediate" depends upon many factors, including launch conditions, input distribution, fiber inhomogeneities, and bends [9], [10], [11]. Some feel for the relevant length scale comes from the fact that if the launching optics focus the light into a spot much smaller than the fiber core, it will take 10 m to 1000 m to reach steady-state [12].…”

Section: Fiber Lengthmentioning

confidence: 99%

Understanding high-power fiber-optic laser beam delivery

Hunter

Leong

Miller³

et al. 1996

Journal of Laser Applications

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Fiber-optic beam delivery is commonly used on industrial laser systems. This article examines the conditions for the optimal propagation of high power beams through optical fibers. Beam quality effects by step and gradient index fibers of different lengths are considered. The differences between the diverging beam from a fiber and the beam at focus and on the fiber face are illustrated. Estimates are provided of the worst-case beam quality to be expected from fibers. Guidelines are also provided for the selection of beam delivery components based on the limitations of the optical system and the tasks to be performed.

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Section: Fiber Lengthmentioning

confidence: 99%

Understanding high-power fiber-optic laser beam delivery

Hunter

Leong

Miller³

et al. 1996

Journal of Laser Applications

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“…This, in return, changes the output intensity distribution. 19,20 In the case of silver halide fibers, there is relatively high scattering, with a significant mode coupling. The power flow in the fiber is thus rapidly redistributed.…”

Section: Discussionmentioning

confidence: 99%

Hollow glass waveguides and silver halide fibers as scanning elements for <inline-formula><roman>CO</roman><sub><roman>2</roman></sub></inline-formula> laser marking systems

et al. 2000

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We have designed and constructed a CO 2 laser marking system based on a scanned flexible waveguide (silver halide infrared optical fiber or a hollow glass waveguide). CO 2 laser power was introduced into the proximal end of the waveguide and the distal tip was placed near the surface of a sample. A permanent magnet was attached to the distal tip, which was displaced in the X and Y directions, using a varying electro magnetic field. An on-line computerized system was used to control the laser power, the position of the distal tip and the scanning speed. The system is capable of cutting, heating or marking on various surfaces. The output profile distribution, spot size and resolution of hollow waveguides and silver halide fibers were investigated and compared.

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“…The results achieved good agreement between simulations and experimental data, but a wider variety of optical fibers must be measured to validate the modeling. Further studies on ray modeling were undertaken by Pike et al [28] and Su et al [29]. Pike et al, analyzed the propagation of rays inside capillaries and their brightness distribution.…”

Section: Ray Modelingmentioning

confidence: 99%

Fiber-Optic Skew Ray Sensors

Chen

Wang

Lancaster

2020

Sensors

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The evanescent fields along multimode fibers are usually relatively weak. To enhance the sensitivity of the resulting sensors, skew rays have been exploited for their larger number of total internal reflections and their more comprehensive spread over the fiber surface. The uniform distribution of light–matter interactions across the fiber surface facilitates high sensitivity through an increased interaction area, while mitigating the risk of laser-induced coating-material damage and photobleaching. Power-dependent measurements are less susceptible to temperature effects than interferometric techniques, and place loose requirements on the laser source. This review highlights the key developments in this area, while discussing the benefits, challenges as well as future development.

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Beam delivery by large-core fibers: effect of launching conditions on near-field output profile

Cited by 36 publications

References 5 publications

Understanding high-power fiber-optic laser beam delivery

Understanding high-power fiber-optic laser beam delivery

Hollow glass waveguides and silver halide fibers as scanning elements for <inline-formula><roman>CO</roman><sub><roman>2</roman></sub></inline-formula> laser marking systems

Fiber-Optic Skew Ray Sensors

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