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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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All-fiber bidirectional optical parametric oscillator for precision sensing.

R Gowda, N Nguyen, J-C Diels

    Optics Letters
    |May 1, 2015
    PubMed
    Summary

    We developed a novel fiber-based optical parametric oscillator (FOPO) for precision sensing. This all-fiber design simplifies operation and enables ultra-sensitive measurements, particularly for rotation sensing.

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    Area of Science:

    • Photonics and Optical Engineering
    • Precision Measurement and Sensing

    Background:

    • Optical parametric oscillators (OPOs) are crucial for generating tunable light sources.
    • Existing OPO designs often require complex free-space alignment and external delay lines, limiting their practicality for robust sensing applications.

    Purpose of the Study:

    • To design and demonstrate an all-fiber, synchronously pumped, bidirectional optical parametric oscillator (FOPO).
    • To showcase the FOPO's capability for precision sensing applications, leveraging its unique design features.

    Main Methods:

    • Development of a synchronously pumped, bidirectional fiber-based OPO.
    • Characterization of the generated dual frequency combs.
    • Measurement of the beatnote linewidth between the two frequency combs.

    Main Results:

    • The FOPO successfully generated two frequency combs with identical repetition rates and different carrier offset frequencies.
    • A narrow beatnote linewidth (<10 Hz FWHM) was achieved by overlapping the frequency combs.
    • The all-fiber design eliminated the need for free-space alignment and external delay lines due to automatic delay compensation.

    Conclusions:

    • The novel all-fiber FOPO offers a simplified and robust platform for precision sensing.
    • The demonstrated performance indicates significant potential for applications such as ultra-large area and high-sensitivity rotation sensing.