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$Interference and Diffraction$ 02:18

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.

Travelling Waves

Travelling Waves

A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is water;...

Interference and Superposition of Waves

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,...

Reflection of Waves

Reflection of Waves

When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...

Propagation of Waves

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...

Shock Waves

Shock Waves

While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs.
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high pressures...

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Related Experiment Video

Updated: Jun 4, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Optical rogue waves.

D R Solli¹, C Ropers, P Koonath

¹Department of Electrical Engineering, University of California, Los Angeles 90095, USA. solli@ucla.edu

|December 14, 2007

Summary

This summary is machine-generated.

Scientists observed optical rogue waves, rare, large waves in a fiber optic system. These events, similar to ocean rogue waves, originate from noise-induced power transfer in nonlinear processes.

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Last Updated: Jun 4, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

Area of Science:

Nonlinear optics
Wave physics

Background:

Ocean rogue waves occur more frequently than predicted by standard statistics.
Understanding the physics of rogue waves is incomplete.
Rogue waves have not been observed in other physical systems.

Purpose of the Study:

Introduce and observe optical rogue waves.
Investigate the generation mechanism of these optical rogue waves.

Main Methods:

Utilized a microstructured optical fiber system.
Employed a new real-time detection technique.
Modeled rogue wave generation using the generalized nonlinear Schrödinger equation.

Main Results:

Observed optical rogue waves in a fiber optic system near the threshold of soliton-fission supercontinuum generation.
Demonstrated that rogue waves arise from initially smooth pulses due to noise-seeded power transfer.
Showed that these events are rare outcomes from nearly identical initial wave populations.

Conclusions:

Optical rogue waves are a valid phenomenon, analogous to water waves.
Noise perturbations play a crucial role in initiating rogue wave formation in nonlinear optical systems.