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Related Concept Videos

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...
Interference and Diffraction02:18

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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.
Traveling Waves: Lossless Lines01:27

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Related Experiment Video

Updated: Jun 16, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Theory of backscattering effects in waveguides.

F P Kapron, R D Maurer, M P Teter

    Applied Optics
    |February 2, 2010
    PubMed
    Summary

    Multiple back and forth scatterings in optical waveguides create interference, limiting data transmission. A specific backscattered power threshold in fiber optics defines the maximum bit rate for clear signal reception.

    Area of Science:

    • Physics
    • Optical Engineering
    • Telecommunications

    Background:

    • Waveguide signal transmission involves scattering phenomena.
    • Scattering leads to delayed, decaying interference after a sharp pulse.
    • This interference impacts the signal-to-interference ratio and data capacity.

    Purpose of the Study:

    • To analytically describe waveguide scattering interference.
    • To estimate the impact of this interference on information-carrying capacity.
    • To determine critical parameters for bit rate limitations.

    Main Methods:

    • Analytical modeling of scattering effects in waveguides.
    • Calculation of interference patterns and decay rates.
    • Estimation of signal-to-interference ratio under specific conditions.

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    Published on: September 26, 2014

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    10:35

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    Main Results:

    • Scattering creates a trailing interference pattern behind signal pulses.
    • An analytical model quantifies this phenomenon.
    • For a 1-km fiber with 20-dB attenuation and a signal-to-interference ratio of 100, a limit is found.

    Conclusions:

    • Waveguide scattering interference is a key factor in data rate limitations.
    • The fractional backscattered power captured per unit length is a critical metric.
    • Exceeding 1.3 dB/km fractional backscattered power limits bit rate in the example scenario.