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Related Concept Videos

Group Polarization01:01

Group Polarization

Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
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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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...

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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

Electrooptic polarization switch for multimode fibers.

A R Nelson, R A Soref

    Applied Optics
    |February 20, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Designing an electrooptic polarization switch for multimode fiber systems is feasible. Using isotropic materials like CdTe offers a 30-dB signal-to-crosstalk ratio with acceptable control voltages.

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    Area of Science:

    • Optoelectronics
    • Optical Communication Systems
    • Materials Science

    Background:

    • Electrooptic polarization switches are crucial components in optical communication.
    • Multimode optical fiber systems present unique challenges for device integration.
    • Minimizing optical crosstalk and control voltage is essential for practical applications.

    Purpose of the Study:

    • To theoretically analyze the performance of electrooptic polarization switches.
    • To determine the feasibility of designing switches for multimode fiber systems.
    • To assess optical crosstalk and control voltage requirements.

    Main Methods:

    • Theoretical analysis of electrooptic polarization switch design.
    • Simulation of device performance with different optical materials.
    • Evaluation of signal-to-crosstalk ratio and drive voltage.

    Main Results:

    • A 30-dB signal-to-crosstalk ratio is achievable with isotropic materials (e.g., CdTe).
    • Anisotropic materials (e.g., LiTaO3) yield lower isolation (~7 dB).
    • Drive voltages range from 10 V to 50 V for both material types.

    Conclusions:

    • Electrooptic polarization switches can be designed for multimode fiber systems.
    • Material selection significantly impacts optical crosstalk and isolation.
    • The proposed designs offer practical solutions for optical switching applications.