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Abstract <p>The scale factor stability of a fiber-optic gyroscope (FOG) directly depends on the stability of the central wavelength of its optical source. Although broadband highly stable light sources used in high-precision FOGs provide excellent wavelength stability, they are typically bulky, which complicates the miniaturization of FOGs and FOG-based systems. This work investigates the use of a semiconductor laser diode with pulse-frequency current modulation in a navigation-grade FOG. It is shown that this approach provides superior central-wavelength stability (better than 1.6 ppm), resulting in a FOG angle random walk and bias instability of 0.002°/√h and 0.009°/h, respectively. Comparable performance can be obtained in FOGs employing broadband highly stable light sources.</p>

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Navigation-Grade Laser-Driven Fiber-Optic Gyroscope

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • A. S. Aleinik,
  • S. A. Volkovsky,
  • V. S. Oshlakov,
  • A. B. Mukhtubaev,
  • V. E. Strigalev

摘要

Abstract

The scale factor stability of a fiber-optic gyroscope (FOG) directly depends on the stability of the central wavelength of its optical source. Although broadband highly stable light sources used in high-precision FOGs provide excellent wavelength stability, they are typically bulky, which complicates the miniaturization of FOGs and FOG-based systems. This work investigates the use of a semiconductor laser diode with pulse-frequency current modulation in a navigation-grade FOG. It is shown that this approach provides superior central-wavelength stability (better than 1.6 ppm), resulting in a FOG angle random walk and bias instability of 0.002°/√h and 0.009°/h, respectively. Comparable performance can be obtained in FOGs employing broadband highly stable light sources.