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Related Concept Videos

Three-Winding Transformers01:19

Three-Winding Transformers

Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
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...

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Related Experiment Video

Updated: Jun 20, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

Automatic endless polarization control with integrated-optical Ti:LiNbO(3) polarization transformers.

R Noé, H Heidrich, D Hoffmann

    Optics Letters
    |September 12, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a practical closed-loop polarization control system for coherent optical transmission, ensuring continuous polarization matching. The system uses two integrated-optical retarders, achieving low intensity losses below 0.15 dB.

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    Published on: September 5, 2019

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    Last Updated: Jun 20, 2026

    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
    14:18

    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

    Published on: February 28, 2016

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    Area of Science:

    • Optics and Photonics
    • Optical Communications

    Background:

    • Coherent optical transmission systems require continuous polarization matching for optimal performance.
    • Maintaining stable polarization states between superposed beams is a critical challenge.

    Purpose of the Study:

    • To develop and demonstrate a practical closed-loop polarization control system.
    • To achieve continuous and endless polarization matching in optical transmission.

    Main Methods:

    • Utilizing a closed-loop system with two integrated-optical retarders as polarization transformers.
    • Employing retarders with variable retardations and eigenmodes, akin to a Babinet-Soleil compensator.
    • Incorporating a second retarder to compensate for non-ideal behavior of the first.

    Main Results:

    • Demonstrated a practical and effective closed-loop polarization control system.
    • Achieved intensity losses of less than 0.15 dB during polarization control.
    • Successfully ensured continuous polarization matching between superposed beams.

    Conclusions:

    • The developed system offers a robust solution for polarization control in coherent optical systems.
    • The use of two integrated-optical retarders enhances system performance by correcting non-ideal behaviors.
    • The low insertion loss makes this system suitable for practical implementation.