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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Fiber based polarization filter for radially and azimuthally polarized light
Christoph Jocher1, Cesar Jauregui, Christian Voigtländer
1Friedrich-Schiller-Universität Jena, Institute of Applied Physics, Albert-Einstein-Str. 15, 07745 Jena, Germany. christoph.jocher@uni-jena.de
Optics Express
|October 15, 2011
Summary
We developed a novel fiber optic filter for separating radially or azimuthally polarized light. This method uses a fiber Bragg grating in high numerical aperture fibers to spectrally isolate light polarization states.
Area of Science:
- Optics and Photonics
- Fiber Optics
- Polarization Optics
Background:
- Polarized light filtering is crucial for various optical applications.
- Traditional methods for filtering specific polarization states can be complex and inefficient.
- High numerical aperture (NA) fibers offer unique modal properties.
Purpose of the Study:
- To demonstrate a new fiber-based concept for filtering azimuthally or radially polarized light.
- To leverage modal degeneracy lifting in high NA fibers for polarization control.
- To achieve spectral separation of polarized modes using fiber Bragg gratings.
Main Methods:
- Utilizing high numerical aperture (NA) fibers where modal degeneracy is lifted.
- Implementing a fiber Bragg grating (FBG) to spectrally separate polarized modes.
- Writing an FBG into a commercially available fiber using a femtosecond pulsed laser.
Main Results:
- Successfully demonstrated spectral separation of radially and azimuthally polarized modes.
- Filtered azimuthally polarized light as a proof of concept.
- Showcased the effectiveness of the FBG in a standard fiber.
Conclusions:
- The proposed fiber-based concept offers a novel and effective method for filtering polarized light.
- This technique has potential applications in optical communications, sensing, and imaging.
- The use of FBGs in high NA fibers provides a compact and integrated solution for polarization filtering.
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