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Related Experiment Videos

High mechanical bandwidth fiber-coupled Fabry-Perot cavity.

Erika Janitz, Maximilian Ruf, Yannik Fontana

    Optics Express
    |October 19, 2017
    PubMed
    Summary

    This study demonstrates a compact fiber-based optical microcavity design achieving a 44 kHz locking bandwidth for high-frequency cavity length stabilization. This breakthrough enhances coupling light to microscopic systems in demanding environments.

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    Area of Science:

    • Optics and Photonics
    • Cavity Quantum Electrodynamics
    • Mechanical Resonators

    Background:

    • Fiber-based optical microcavities offer high quality factors and low mode volumes, ideal for light-matter interactions.
    • Their low mass suggests potential for high-frequency mechanical response and cavity length stabilization.

    Purpose of the Study:

    • To demonstrate a high bandwidth stabilization of fiber-based optical microcavity length.
    • To develop a simple, compact design compatible with vacuum and cryogenic conditions.

    Main Methods:

    • Fabrication of a fiber-based optical microcavity.
    • Implementation of a feedback control system for cavity length stabilization.
    • Measurement of open-loop and closed-loop transfer functions.
    • Simulations of the mechanical response.

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    Main Results:

    • Achieved a locking bandwidth of 44 kHz.
    • Demonstrated a simple and compact design.
    • Confirmed compatibility with vacuum and cryogenic environments.
    • Identified limitations and potential improvements through transfer function analysis and simulations.

    Conclusions:

    • The demonstrated fiber-based microcavity design enables high-bandwidth length stabilization.
    • The design's simplicity and environmental compatibility make it suitable for advanced quantum optics experiments.
    • Further improvements are possible by addressing identified mechanical and electronic limitations.