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Maximum Power Transfer01:16

Maximum Power Transfer

Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
Power Factor Correction01:20

Power Factor Correction

The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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:
Energy Stored In A Coaxial Cable01:31

Energy Stored In A Coaxial Cable

A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...

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Related Experiment Video

Updated: Jun 22, 2026

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

10Gbit/s Multimode Fiber Link using Power-Efficient Orthogonal-Frequency-Division Multiplexing.

Arthur James Lowery, Jean Armstrong

    Optics Express
    |June 9, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new method for transmitting Orthogonal Frequency Division Multiplexing (OFDM) signals over multimode fibers, improving electrical signal-to-noise ratio (SNR) and enabling dispersion compensation for better optical communication.

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    Last Updated: Jun 22, 2026

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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    Published on: November 22, 2019

    Area of Science:

    • Optical Communications
    • Signal Processing
    • Fiber Optics

    Background:

    • Orthogonal Frequency Division Multiplexing (OFDM) offers electronic dispersion compensation for optical paths.
    • Current OFDM methods require high bias for signal conversion, leading to optical power inefficiency.
    • Existing methods struggle with intermodal dispersion in multimode fibers.

    Purpose of the Study:

    • To present a novel method for transmitting OFDM signals over multimode fibers.
    • To enhance electrical signal-to-noise ratio (SNR) for a given optical power.
    • To demonstrate the compensation of intermodal dispersion and improve sensitivity.

    Main Methods:

    • Simulations were used to evaluate the proposed OFDM transmission method.
    • The method focuses on increasing electrical SNR for optical signals.
    • Comparison with 10 Gbit/s Non-Return to Zero (NRZ) signaling was performed.

    Main Results:

    • The novel OFDM method increases electrical SNR by 7 dB for a given optical power.
    • A 1.8 dB sensitivity benefit was observed compared to 10 Gbit/s NRZ.
    • Successful compensation of intermodal dispersion in a 300-m multimode fiber was demonstrated.

    Conclusions:

    • The proposed OFDM technique improves optical power efficiency and electrical SNR.
    • This method offers a viable solution for high-speed communication over multimode fibers.
    • It overcomes limitations of NRZ signaling in supporting intermodal dispersion compensation.