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Related Concept Videos

Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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Related Experiment Video

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

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Published on: February 28, 2016

Performance limitations imposed on optical waveguide switches and modulators by polarization.

R A Steinberg, T G Giallorenzi

    Applied Optics
    |February 19, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Polarization crosstalk in optical waveguide switches and modulators is investigated. Design conditions are identified to minimize polarization sensitivity for fiber optic integration.

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    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics

    Background:

    • Optical waveguide switches and modulators are key components in photonic integrated circuits.
    • Coupling fiber optic transmission lines to integrated optical circuits can lead to simultaneous presence of two polarizations.

    Purpose of the Study:

    • To investigate the impact of dual-polarization crosstalk on optical waveguide switch/modulator performance.
    • To identify design strategies for mitigating polarization sensitivity in these devices.

    Main Methods:

    • Theoretical analysis of polarization crosstalk effects.
    • Device design simulations and performance evaluation under dual-polarization conditions.

    Main Results:

    • Simultaneous presence of two polarizations significantly affects modulator/switch performance.
    • Identified specific device design conditions that minimize polarization sensitivity.

    Conclusions:

    • Minimizing polarization sensitivity is crucial for reliable operation of optical switches/modulators integrated with fiber optics.
    • The findings provide guidelines for designing polarization-insensitive optical waveguide devices.