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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Phase sensitive low-coherence interferometry using microwave photonics.

Juan Clement, Haroldo Maestre, Germán Torregrosa

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    |October 29, 2020
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    Summary
    This summary is machine-generated.

    This study introduces a novel Microwave Photonics (MWP) interferometer for stable phase determination. It achieves high-resolution interferograms, surpassing previous MWP methods for optical component characterization.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • Spectroscopy

    Background:

    • Low-coherence interferometry is crucial for high-resolution measurements.
    • Microwave Photonics (MWP) offers unique capabilities for optical signal processing.
    • Accurate phase determination in interferograms remains a challenge.

    Purpose of the Study:

    • To develop a stable low-coherence interferometer using MWP for precise phase determination.
    • To overcome limitations of existing MWP-based interferometers.
    • To demonstrate advanced characterization of optical components.

    Main Methods:

    • Utilizing a suppressed carrier, double-sideband modulation scheme.
    • Employing dispersive propagation in a chirped fiber Bragg grating.
    • Implementing electro-optical frequency down-conversion and advanced signal processing.

    Main Results:

    • Achieved stable, high-resolution interferogram amplitude and phase determination.
    • Extended the measurable optical path difference to 16.3 mm.
    • Demonstrated 5.5 fs temporal resolution, 14 GHz spectral resolution, and 0.55 μm spatial resolution.

    Conclusions:

    • The developed MWP interferometer enables unprecedented stability and resolution in optical measurements.
    • This technique significantly advances the characterization of C-band sources and components.
    • The system offers a robust platform for future optical metrology applications.