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Related Concept Videos

Transmission Line Design Considerations01:23

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
Reducing Line Loss01:18

Reducing Line Loss

In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
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...
Lossless Lines01:23

Lossless Lines

In electrical engineering, a lossless transmission line is characterized by a purely imaginary propagation constant and a resistive characteristic impedance. The ABCD parameters, which describe the relationship between the input and output voltages and currents, indicate an equivalent π circuit with an imaginary series impedance and a shunt admittance. This results in a transmission line that, when the product of the phase constant (beta) and the length of the line is less than pi, exhibits...

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Related Experiment Video

Updated: Jun 15, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Multimode fiber-optics coupler with low insertion loss.

M D Drake

    Applied Optics
    |March 6, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel fiber-optics coupler that is easy to make, directional, and preserves fiber integrity with minimal insertion loss. It leverages leaky fiber modes, offering adjustable coupling for applications like optical data buses and monitoring systems.

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    Area of Science:

    • Optoelectronics
    • Fiber Optics Communication

    Background:

    • Traditional fiber-optic couplers can be complex to fabricate and may cause signal loss.
    • Efficient and reliable coupling mechanisms are crucial for optical data transmission and monitoring.

    Purpose of the Study:

    • To develop a simple, directional fiber-optics coupler with low insertion loss.
    • To explore the use of leaky fiber modes for efficient optical energy transfer.
    • To demonstrate the versatility of the coupler for various applications.

    Main Methods:

    • Fabrication of a novel fiber-optics coupler.
    • Utilizing energy from leaky modes of the optical fiber.
    • Varying the coupling ratio by adjusting the light source and input conditions.

    Main Results:

    • The developed coupler is simple to fabricate and directional.
    • Achieved an insertion loss of less than 0.05 dB.
    • Demonstrated that the coupling ratio is adjustable based on light source and input conditions.

    Conclusions:

    • The novel fiber-optics coupler offers a practical solution for optical data bus links and monitoring.
    • The use of leaky modes provides an efficient and low-loss coupling mechanism.
    • The coupler's adaptability makes it suitable for diverse fiber optic systems.