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Generating long-term stable squeezed states via multiple pump noise suppression.

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    This summary is machine-generated.

    We developed a new method to stabilize quantum sensing light sources by suppressing pump power fluctuations. This enhances long-term stability for quantum precision measurements.

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    Area of Science:

    • Quantum optics
    • Laser physics
    • Precision measurement

    Background:

    • Pump power fluctuations critically limit the long-term stability of quantum sensing light sources.
    • Existing laser power stabilization methods are inefficient at suppressing noise from beam-pointing fluctuations.

    Purpose of the Study:

    • To propose and demonstrate an optimized scheme for suppressing pump power fluctuations in quantum sensing light sources.
    • To improve the long-term stability and performance of quantum squeezing sources.

    Main Methods:

    • Integration of a passive second harmonic generation process with active feedback control.
    • Simultaneous suppression of pointing and intensity noise in the pump laser field.

    Main Results:

    • Achieved a quantum sensing light source with a squeezing factor of 10.0 dB.
    • Demonstrated noise fluctuations below 0.4 dB over 8.5 hours of measurement.
    • Successfully suppressed both pointing and intensity noise in the pump field.

    Conclusions:

    • The proposed scheme effectively enhances the long-term stability of quantum squeezing sources.
    • This advancement paves the way for broader applications of squeezing sources in quantum precision measurement.