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Related Concept Videos

Deflection of a Beam01:19

Deflection of a Beam

856
Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
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Deformation of a Beam under Transverse Loading01:15

Deformation of a Beam under Transverse Loading

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Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
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Related Experiment Video

Updated: Mar 15, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Optimization of beam transformation system for laser-diode bars.

Junhong Yu, Linhui Guo, Hualing Wu

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    |August 25, 2016
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    Summary

    An optimized beam transformation system (BTS) significantly reduces beam quality deterioration in laser-diode bars. This advancement enables efficient coupling of high-power laser beams into optical fibers.

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    Area of Science:

    • Optics and Photonics
    • Laser Technology

    Background:

    • Laser-diode bars are crucial light sources but suffer from beam quality degradation.
    • Efficient beam shaping is essential for high-power laser applications.

    Purpose of the Study:

    • To design and validate an optimized beam transformation system (BTS) for laser-diode bars.
    • To minimize beam quality deterioration after transformation.

    Main Methods:

    • Systematic optimization of the beam transformation system design.
    • Utilizing both optical simulation and experimental validation.

    Main Results:

    • Achieved beam quality of approximately 5.0 mm × 3.6 mrad for a 9-emitter mini-bar.
    • Successfully coupled the shaped laser beam into a 100 μm core, 0.15 numerical aperture (NA) fiber.
    • Demonstrated an output power exceeding 100 W with an electric-optical efficiency of 46.8%.

    Conclusions:

    • The optimized BTS effectively preserves and improves laser-diode bar beam quality.
    • The system facilitates high-power laser delivery for various applications.