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Aircraft-navigation-grade laser-driven FOG with Gaussian-noise phase modulation.

Jacob Chamoun, Michel J F Digonnet

    Optics Letters
    |April 15, 2017
    PubMed
    Summary
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    A novel laser-driven fiber optic gyroscope (FOG) meets commercial aircraft navigation needs. This advanced FOG uses phase modulation for superior performance compared to traditional sources.

    Area of Science:

    • Photonics and optical sensing
    • Inertial navigation systems

    Background:

    • Fiber optic gyroscopes (FOGs) are crucial for navigation.
    • Conventional FOGs often use superfluorescent fiber sources.
    • Laser-driven FOGs offer potential for improved performance.

    Purpose of the Study:

    • To demonstrate a laser-driven fiber optic gyroscope (FOG) meeting commercial aircraft inertial navigation requirements.
    • To evaluate the performance of a laser-driven FOG using Gaussian white noise phase modulation.
    • To compare the laser-driven FOG performance against a conventional superfluorescent fiber source.

    Main Methods:

    • Utilizing Gaussian white noise phase modulation to broaden laser linewidth and suppress optical carrier.
    • Implementing a laser source in a fiber optic gyroscope configuration.

    Related Experiment Videos

  • Characterizing angular random walk noise, drift, and scale-factor stability.

    • Main Results:

    • Achieved an angular random walk noise of 5.5×10-4 deg/√h and drift of 6.8×10-3 deg/h.
    • Inferred scale-factor stability of 0.15 ppm.
    • Demonstrated performance comparable to, or better in noise than, conventional superfluorescent fiber sources.

    Conclusions:

    • The demonstrated laser-driven FOG is the first to meet commercial aircraft inertial navigation performance requirements.
    • Gaussian white noise phase modulation effectively enhances laser-driven FOG performance.
    • Laser-driven FOGs present a viable alternative to traditional sources for high-precision navigation.