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Related Concept Videos

Modes of Standing Waves: II01:04

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The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
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A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Asymmetric Bessel modes.

V V Kotlyar, A A Kovalev, V A Soifer

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    |July 1, 2014
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    Summary
    This summary is machine-generated.

    We introduce asymmetric elegant Bessel modes (aB-modes), a new class of light beams. These modes offer tunable orbital angular momentum (OAM) and can be shaped from symmetric Bessel modes into crescent forms.

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    Area of Science:

    • Optics and Photonics
    • Quantum Optics

    Background:

    • Bessel modes are known for their diffraction-free propagation and unique intensity profiles.
    • Orbital angular momentum (OAM) in light beams enables advanced applications in optical manipulation and communication.

    Purpose of the Study:

    • To introduce a novel, three-parameter family of asymmetric elegant Bessel modes (aB-modes).
    • To explore the tunability of OAM and beam shape in these new modes.

    Main Methods:

    • The study utilizes the nth-order Bessel function of the first kind with a complex argument to describe the aB-modes.
    • Analysis of the nonparaxial aB-mode properties using a real parameter 'c' to control asymmetry.

    Main Results:

    • The proposed aB-modes exhibit tunable asymmetry, transitioning from radially symmetric Bessel modes (c=0) to crescent shapes (c≫1).
    • Intensity zeros on the horizontal axis generate optical vortices with controllable topological charge and sign.
    • The orbital angular momentum (OAM) per photon is shown to depend near-linearly on the asymmetry parameter 'c'.

    Conclusions:

    • The new family of aB-modes provides a versatile platform for generating light beams with controllable OAM and spatial profiles.
    • These modes offer potential for novel applications in areas requiring tailored optical vortex generation and beam shaping.