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Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Propagation of Waves01:07

Propagation of Waves

When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Standing Waves01:17

Standing Waves

Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Interference and Superposition of Waves01:07

Interference and Superposition of Waves

When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
Sound Waves: Interference00:53

Sound Waves: Interference

Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...

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Related Experiment Video

Updated: Jun 20, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Optical solitary waves induced by cross-phase modulation.

S Trillo, S Wabnitz, E M Wright

    Optics Letters
    |September 12, 2009
    PubMed
    Summary

    An optical pulse can propagate without distortion as a bright solitary wave. This occurs in normal dispersion when coupled to a dark pulse in the anomalous dispersion regime via cross-phase modulation.

    Area of Science:

    • Nonlinear optics
    • Wave propagation physics

    Background:

    • Solitary waves are localized wave packets that maintain their shape during propagation.
    • Dispersion management is crucial for controlling optical pulse behavior in nonlinear systems.

    Purpose of the Study:

    • To demonstrate the formation of a stable bright optical solitary wave in the normal dispersion regime.
    • To investigate the role of cross-phase modulation in coupling different pulse types across dispersion regimes.

    Main Methods:

    • Theoretical analysis of nonlinear Schrödinger equations.
    • Numerical simulations of coupled optical pulse propagation.

    Main Results:

    • A bright solitary wave can propagate undistorted in the normal dispersion regime.

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    Last Updated: Jun 20, 2026

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    08:39

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    Published on: January 28, 2019

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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  • This stable propagation is achieved through coupling with a dark solitary wave in the anomalous dispersion regime.
  • Cross-phase modulation mediates the energy and phase transfer between the coupled pulses.

    • Conclusions:

    • Coupling bright and dark solitary waves across different dispersion regimes offers a novel method for pulse stabilization.
    • This finding has implications for optical communications and nonlinear pulse shaping.