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Compact squeezed light source for higher-order Hermite-Gaussian modes.

Jiaming Li, Juntao He, Hongbo Liu

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    This summary is machine-generated.

    Researchers developed a compact source for higher-order spatial modes squeezed light. This new method efficiently generates squeezed vacuum states in various HG modes, advancing quantum optics.

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    Area of Science:

    • Quantum Optics
    • Nonclassical Light Generation
    • Quantum State Engineering

    Background:

    • Squeezed light is a crucial nonclassical resource in quantum optics.
    • Progress in generating and manipulating squeezed light has been significant.
    • Higher-order spatial modes are increasingly important for advanced quantum applications.

    Purpose of the Study:

    • To experimentally demonstrate a compact source for higher-order spatial modes squeezed light.
    • To integrate second-harmonic generation (SHG) and optical parametric oscillation (OPO) in a single doubly resonant cavity.
    • To generate Hermite-Gaussian (HG) mode squeezed states with enhanced efficiency and purity.

    Main Methods:

    • Utilized a single doubly resonant cavity integrating SHG and OPO.
    • Generated the necessary HG2m,2n pump field via internal SHG.
    • Successfully produced squeezed vacuum states in HG0,0, HG1,0, and HG2,0 modes.

    Main Results:

    • Achieved significant squeezing levels: -4.53 ± 0.26 dB (HG0,0), -3.68 ± 0.19 dB (HG1,0), and -2.58 ± 0.08 dB (HG2,0).
    • Demonstrated enhanced conversion efficiency and mode purity due to internal SHG.
    • Developed a compact and efficient source for multimode squeezed light.

    Conclusions:

    • The demonstrated platform offers a viable pathway for scalable, multimode quantum state generation.
    • This technology has broad potential applications in quantum metrology and quantum communication.
    • The integrated cavity design represents a significant advancement in squeezed light source development.