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8The temperature influence on the characteristics of the sensitive element of a resonator fiber-optic gyroscope
K.A. Ovchinnikov1'2*, D.G. Gilev1'2' V.V. Krishtop1'2
1- Perm Scientific-industrial Instrument Making Company, Perm, 614007 Russia 2- Perm National Research Polytechnic University, Perm, 614007 Russia
Miniaturization is an important task in modern science and technology, which is also actively developing in the field of fiber-optic sensors. Reducing the size of the sensors allows you to expand the scope of applications and solve complex tasks that were previously unavailable. In the field of fiberoptic gyroscopy, fiber-optic resonators [1] are a promising candidate for solving the miniaturization problem, which make it possible to reduce the dimensions of the sensing element by repeatedly passing the optical path inside the closed cavity of the resonator.
Recently, more and more research has been devoted to a new scheme of resonator fiber-optic gyroscopes operating on broadband radiation, which reduces the influence of backscattered radiation noise and increases the stability of resonator gyroscopes [2,3].
An experimental study was conducted on the effect of ambient temperature in the range from -30°C to +50°C on the optical circuit of a resonator fiber-optic gyroscope with a resonant circuit length of 50 m and with a superluminescent diode with a central wavelength of 1550 nm as a radiation source. The study of the temperature effect on the optical circuit as a whole and on its individual components is an important step in the development of devices, since it helps to determine the critical parameters to ensure the temperature stability of the final device.
The analysis of experimental data shows that when developing such sensors to increase stability, it is necessary to take into account and compensate for the influence of such parameters as: changes in the total losses of the optical circuit, the central wavelength of the radiation source, the half-wave voltage of the phase modulator used and changes in the input power of the superluminescent diode at different temperatures.
The research was funded by the Ministry of Science and Higher Education of the Russian Federation (Project No. FSNM-2023-0006).
[1] D.G. Gilev, K.A. Ovchinnikov, V.V. Krishtop, et al, Fiber Optic Resonators for Angular Rate Sensors, Bull. Russ. Acad. Sci. Phys. 86 (Suppl 1), S75-S80 (2022).
[2] S. Zhao, Q. Liu, Y. Liu, H. Ma, Z. He, Navigation-grade resonant fiber-optic gyroscope using ultra-simple white-light multibeam interferometry, Photon. Res. 10, 542-549 (2022).
[3] K.A. Ovchinnikov, D.G. Gilev, V.V. Krishtop, et al, A Prototype for a Passive Resonant Interferometric Fiber Optic Gyroscope with a 3x3 Directional Coupler, Sensors. 23(3):1319, (2023).
