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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.
Polar Curves01:19

Polar Curves

The spirograph is a versatile tool for visualizing the relationship between geometry and mathematical representation. In particular, it demonstrates how polar coordinates offer an alternative framework for describing curves in comparison to Cartesian coordinates. Instead of specifying a point by its horizontal and vertical displacements (x, y), polar coordinates use a radius r, the distance from the origin, and an angle θ, measured counterclockwise from the polar axis. This system is...
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...
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
Graphs of Polar Equations01:17

Graphs of Polar Equations

The polar coordinate system represents points using a distance from a central point (the pole) and an angle from a reference direction (the polar axis). Unlike rectangular coordinates, polar coordinates are ideal for graphing curves with radial symmetry or periodic behavior.Some general forms of graphs in polar coordinates include the following:Equation of a Circle (Centered at the Pole):A graph where the radius remains constant for all angles traces a circle centered at the pole:Equation of a...
Polar Equations of Conics01:29

Polar Equations of Conics

A conic section can be defined in polar coordinates as the set of all points whose distance from a fixed point, known as the focus, bears a constant ratio to their distance from a fixed line, known as the directrix. This constant ratio is called the eccentricity. This definition unifies all types of conic sections—ellipses, parabolas, and hyperbolas—under a single framework. When the focus is positioned at the origin of the polar coordinate system, a single polar equation can describe any conic...

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Related Experiment Video

Updated: Jul 8, 2026

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

Fiber circular polarizer.

T Hosaka1, K Okamoto, T Edahiro

  • 1NTT Ibaraki Electrical Communication Laboratory, Tokai, Ibaraki-ken 319-11, Japan.

Applied Optics
|December 1, 1983
PubMed
Summary
This summary is machine-generated.

A novel fiber circular polarizer was demonstrated, achieving a 17.6-dB extinction ratio. This device eliminates reflected light, functioning as a quasi-isolator for optical systems.

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Area of Science:

  • Optoelectronics
  • Fiber optics
  • Polarization optics

Background:

  • Circular polarizers are crucial optical components.
  • Integrating polarizers into fiber optic systems presents challenges.
  • Eliminating back-reflection is vital for laser source stability.

Purpose of the Study:

  • To demonstrate a novel fiber circular polarizer.
  • To achieve high extinction ratios for circularly polarized light.
  • To explore its potential as a fiber-based quasi-isolator.

Main Methods:

  • Fabrication of a lambda/4 platelet from birefringent fiber.
  • Integration with a metal-coated fiber polarizer.
  • Finite element method (FEM) simulations for stress analysis and optimal design.
  • Setting the angle between polarizer axis and birefringent fiber major axis to pi/4.

Main Results:

  • Successful demonstration of a fiber circular polarizer.
  • Achieved a maximum extinction ratio of 17.6 dB.
  • Demonstrated effective performance with both left- and right-circularly polarized light.

Conclusions:

  • The developed fiber circular polarizer shows high performance.
  • The device effectively eliminates back-reflected light.
  • It is proposed as a quasi-isolator for fiber optic applications, protecting light sources.