Laser-driven fiber-optic gyroscope

Oshlakov V.S., Aleynik, А.S., Volkovskii S.A., Strigalev, V.E., Mukhtubaev A.B.

For Russian citation (Opticheskii Zhurnal):

Ошлаков В.С., Алейник А.С., Волковский С.А., Стригалев В.Е., Мухтубаев А.Б. Применение полупроводникового лазерного диода в качестве источника оптического излучения волоконно-оптического гироскопа // Оптический журнал. 2025. Т. 92. № 8. С. 21–31. http://doi.org/10.17586/1023-5086-2025-92-08-21-31

Oshlakov V.S., Aleinik A.S., Volkovskii S.A., Strigalev V.E., Muhtubaev A.B. Laserdriven fiber-optic gyroscope [in Russian] // Opticheskii Zhurnal. 2025. V. 92. № 8. P. 21–31. http://doi.org/10.17586/1023-5086-2025-92-08-21-31

For citation (Journal of Optical Technology):

Abstract:

The subject of the study. The work presents the results of an experimental study on the application of a frequency-modulated semiconductor laser diode with distributed feedback in a fiber-optic gyroscope. The purpose of the study. The aim of the study is to improve the long-term stability of the scale factor of the fiber-optic gyroscope while maintaining the compactness of the optical radiation source integrated into the system. Method. Frequency-pulse current modulation was applied to reduce the coherence length of the laser diode emission. Broadband interferometry was used to evaluate the coherence length of the radiation, and optimal parameters of the fiber-optic gyroscope photodetection scheme were selected. The proposed configuration was tested on an open-loop fiber-optic gyroscope prototype, and a comparative assessment of the metrological characteristics of fiber-optic gyroscopes using a laser source and a superluminescent diode was conducted. The main results. The proposed scheme demonstrated its effectiveness. Long-term instability of the central wavelength and angular random walk were reduced to 1.3 ppm and 0.002 °/h^1/2 respectively (compared to 17 ppm and 0.004 °/h^1/2 for the scheme with a superluminescent diode). The bias drift (0.05 °/h) is comparable to that of the reference scheme (0.01 °/h); further reduction of this parameter remains a subject for future research. Practical significance. The experimental results on the use of a frequency-modulated distributed feedback laser diode in a fiber-optic gyroscope indicate the potential applicability of such sources in the development of compact, high-precision fiber-optic gyroscopes.

Keywords:

fiber-optic gyroscope, semiconductor laser diode, pulse current modulation

OCIS codes: 060.2800, 060.2380, 060.2370

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