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Related Concept Videos

Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any finite,...
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
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.
Aliasing01:18

Aliasing

Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
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Properties of Fourier Transform II01:24

Properties of Fourier Transform II

The Fourier Transform (FT) is an essential mathematical tool in signal processing, transforming a time-domain signal into its frequency-domain representation. This transformation elucidates the relationship between time and frequency domains through several properties, each revealing unique aspects of signal behavior.
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Related Experiment Video

Updated: Jun 22, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Optical node with time-space-and-wavelength domain contention resolution, deflection and dropping capability.

J J Vegas Olmos, N Chi, G Zervas

    Optics Express
    |June 17, 2009
    PubMed
    Summary

    This study presents an optical node that resolves time, space, and wavelength conflicts, enabling data deflection and dropping. Experimental results at 10 Gbit/s show minimal power loss after optical buffering and wavelength conversion.

    More Related Videos

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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    Published on: March 20, 2017

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    Last Updated: Jun 22, 2026

    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

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

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    Area of Science:

    • Optical networking
    • Telecommunications

    Background:

    • Modern optical networks face challenges in managing data traffic efficiently.
    • Contention for network resources (time, space, wavelength) can lead to performance degradation.

    Purpose of the Study:

    • To demonstrate a novel optical node capable of resolving contention across multiple domains.
    • To evaluate the performance of the proposed optical node in terms of buffering and wavelength conversion.

    Main Methods:

    • An optical node was constructed using an optical crossconnect and a wavelength converter.
    • The node was tested for its contention resolution, deflection, and dropping capabilities.
    • Bit-error rate measurements were performed to assess performance.

    Main Results:

    • The optical node successfully demonstrated time, space, and wavelength domain contention resolution.
    • Experimental results at 10 Gbit/s showed a power penalty of only 3.5 dB after 10 microseconds of optical buffering.
    • Agile wavelength conversion was achieved over an 18nm span with minimal performance impact.

    Conclusions:

    • The developed optical node offers robust contention resolution for high-speed optical networks.
    • The demonstrated buffering and wavelength conversion capabilities are promising for future network upgrades.
    • The architecture supports substantial bitrate increases beyond the tested 10 Gbit/s.