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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Basis for a polarized superfluorescent fiber source with increased efficiency.

D G Falquier, J L Wagener, M J Digonnet

    Optics Letters
    |November 3, 2009
    PubMed
    Summary

    We developed a linearly polarized superfluorescent fiber source (SFS) by adding a polarizer. This method nearly doubles the output power of the desired polarization mode with minimal loss.

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    Area of Science:

    • Optics and Photonics
    • Fiber Lasers and Amplifiers

    Background:

    • Superfluorescent fiber sources (SFS) are crucial for various applications.
    • Achieving linearly polarized output from SFS often involves complex designs or power loss.

    Purpose of the Study:

    • To propose and analyze a novel method for producing a linearly polarized superfluorescent fiber source (SFS).
    • To investigate the feasibility of achieving high output power in a polarized SFS.

    Main Methods:

    • Insertion of a discrete polarizer into a polarization-maintaining Er-doped fiber.
    • Analysis of the impact of polarizer characteristics (loss, location, extinction ratio) on SFS performance.

    Main Results:

    • Predicted output power of the polarized SFS approaches that of an unpolarized SFS with a low-loss polarizer (<0.5 dB).
    • The power of the desired polarization mode is nearly doubled compared to unpolarized sources.
    • Source efficiency is weakly dependent on polarizer location and extinction ratio, but strongly dependent on insertion loss.

    Conclusions:

    • A simple and effective method for generating a high-power, linearly polarized SFS has been demonstrated.
    • Minimizing polarizer insertion loss is critical for maximizing the efficiency of this polarized SFS design.