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Implementation of a Reference Interferometer for Nanodetection
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Angular velocity measurement with wide range based on dual-comb Sagnac interferometer.

Ruyu Ma, Haoyang Yu, Qiuying Ma

    Optics Letters
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    A novel dual-comb Sagnac interferometer enhances angular velocity measurement. This fiber optic gyroscope system achieves a superior dynamic range, overcoming limitations of conventional designs for applications like spacecraft navigation.

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    Area of Science:

    • Optics and Photonics
    • Inertial Navigation Systems
    • Optical Sensing

    Background:

    • Interferometric fiber optic gyroscopes (IFOGs) are crucial for high-accuracy, high-speed applications in navigation and guidance systems.
    • Conventional IFOGs suffer from a limited dynamic measurement range, restricting their performance in scenarios with rapid angular changes.
    • There is a persistent need for inertial sensors with an expanded dynamic range to meet evolving technological demands.

    Purpose of the Study:

    • To propose and demonstrate a novel angular velocity measurement system utilizing a dual-comb Sagnac interferometer.
    • To significantly enhance the dynamic measurement range of fiber optic gyroscope technology.
    • To provide a superior alternative to conventional fiber optic gyroscopes for demanding applications.

    Main Methods:

    • Development of a passive fiber optic gyroscope architecture incorporating dual optical frequency combs.
    • Theoretical analysis of the dual-comb Sagnac interferometer to determine its angular velocity sensing capabilities.
    • Experimental validation of the proposed system's performance, focusing on its dynamic range.

    Main Results:

    • The proposed dual-comb Sagnac interferometer system exhibits a theoretical dynamic range on the order of 108 deg/s.
    • This represents a substantial improvement over the dynamic range limitations of traditional fiber optic gyroscopes.
    • The system successfully demonstrates the feasibility of a dual-comb-based passive fiber optic gyroscope.

    Conclusions:

    • The dual-comb Sagnac interferometer offers a groundbreaking solution for angular velocity measurement with an exceptionally large dynamic range.
    • This technology presents a significant advancement for inertial navigation, spacecraft attitude control, and missile guidance systems.
    • This work pioneers the use of dual-comb interferometry in passive fiber optic gyroscopes, opening new avenues for high-performance inertial sensing.